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Message-ID: <20120109003255.GA6598@havoc.gtf.org>
Date: Sun, 8 Jan 2012 19:32:55 -0500
From: Jeff Garzik <jeff@...zik.org>
To: Andrew Morton <akpm@...ux-foundation.org>,
Linus Torvalds <torvalds@...ux-foundation.org>
Cc: linux-ide@...r.kernel.org, LKML <linux-kernel@...r.kernel.org>
Subject: [git patches] libata updates for 3.3
Summary (very little excitement at all this time):
0) Will play around with git signed tags with the next update.
1) PM improvements, including runtime suspend/resume work
2) AHCI DMA engine start/stop changes, intended to improve spec
compliance, thereby making a particular IP block work. Tested for a
while in linux-next, but nonetheless worth watching for breakage in the
field.
3) other minor bits.
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
Please pull 318893e1429a9d50569a0379d1e20b0ecc45c555 from
git://github.com/jgarzik/libata-dev.git upstream-linus
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zHlKy0fNvT4=
=z+FO
-----END PGP SIGNATURE-----
to receive the following updates:
drivers/ata/Kconfig | 2 +-
drivers/ata/ahci.c | 26 +++++-
drivers/ata/ahci_platform.c | 68 ++++++++++++++
drivers/ata/libahci.c | 5 +-
drivers/ata/libata-core.c | 188 ++++++++++++++++++++++++++--------------
drivers/ata/libata-scsi.c | 3 +-
drivers/ata/libata-sff.c | 4 +-
drivers/ata/libata-transport.c | 5 +
drivers/ata/libata.h | 1 +
drivers/ata/pata_arasan_cf.c | 12 +---
drivers/ata/pata_at91.c | 15 +---
drivers/ata/pata_bf54x.c | 20 +----
drivers/ata/pata_cs5536.c | 99 +++++++++------------
drivers/ata/pata_imx.c | 12 +---
drivers/ata/pata_ixp4xx_cf.c | 13 +---
drivers/ata/pata_mpc52xx.c | 21 +----
drivers/ata/pata_of_platform.c | 27 ++----
drivers/ata/pata_palmld.c | 13 +---
drivers/ata/pata_platform.c | 12 +---
drivers/ata/pata_pxa.c | 13 +---
drivers/ata/pata_rb532_cf.c | 21 +----
drivers/ata/sata_dwc_460ex.c | 13 +---
drivers/ata/sata_fsl.c | 14 +---
drivers/scsi/scsi_error.c | 5 +-
drivers/scsi/scsi_pm.c | 27 ++++++-
drivers/scsi/sd.c | 5 +
include/linux/ahci_platform.h | 2 +
include/scsi/scsi_host.h | 3 +
28 files changed, 326 insertions(+), 323 deletions(-)
Alessandro Rubini (1):
ahci: support the STA2X11 I/O Hub
Axel Lin (1):
SATA/PATA: convert drivers/ata/* to use module_platform_driver()
Bartlomiej Zolnierkiewicz (1):
pata_cs5536: forward port changes from cs5536
Brian Norris (1):
ahci: platform support for suspend/resume
Lin Ming (9):
ata: make ata port as parent device of scsi host
[SCSI] add flag to skip the runtime PM calls on the host
[SCSI] check runtime PM status in system PM
[SCSI] sd: check runtime PM status in sd_shutdown
ata: add ata port system PM callbacks
ata: add ata port runtime PM callbacks
[SCSI] runtime resume parent for child's system-resume
ata: update ata port's runtime status during system resume
ata: add ata port hibernate callbacks
Rob Herring (1):
pata_of_platform: remove direct dependency on OF_IRQ
Sergei Shtylyov (3):
libata-sff: use ATAPI_{COD|IO}
libata-core: kill duplicate statement in ata_do_set_mode()
pata_bf54x: fix BMIDE status register emulation
Tejun Heo (1):
ahci: start engine only during soft/hard resets
diff --git a/drivers/ata/Kconfig b/drivers/ata/Kconfig
index cf047c4..6bdedd7 100644
--- a/drivers/ata/Kconfig
+++ b/drivers/ata/Kconfig
@@ -820,7 +820,7 @@ config PATA_PLATFORM
config PATA_OF_PLATFORM
tristate "OpenFirmware platform device PATA support"
- depends on PATA_PLATFORM && OF && OF_IRQ
+ depends on PATA_PLATFORM && OF
help
This option enables support for generic directly connected ATA
devices commonly found on embedded systems with OpenFirmware
diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
index cf26222..d07bf03 100644
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -52,7 +52,8 @@
#define DRV_VERSION "3.0"
enum {
- AHCI_PCI_BAR = 5,
+ AHCI_PCI_BAR_STA2X11 = 0,
+ AHCI_PCI_BAR_STANDARD = 5,
};
enum board_ids {
@@ -375,6 +376,9 @@ static const struct pci_device_id ahci_pci_tbl[] = {
{ PCI_VDEVICE(SI, 0x1185), board_ahci }, /* SiS 968 */
{ PCI_VDEVICE(SI, 0x0186), board_ahci }, /* SiS 968 */
+ /* ST Microelectronics */
+ { PCI_VDEVICE(STMICRO, 0xCC06), board_ahci }, /* ST ConneXt */
+
/* Marvell */
{ PCI_VDEVICE(MARVELL, 0x6145), board_ahci_mv }, /* 6145 */
{ PCI_VDEVICE(MARVELL, 0x6121), board_ahci_mv }, /* 6121 */
@@ -622,6 +626,13 @@ static int ahci_configure_dma_masks(struct pci_dev *pdev, int using_dac)
{
int rc;
+ /*
+ * If the device fixup already set the dma_mask to some non-standard
+ * value, don't extend it here. This happens on STA2X11, for example.
+ */
+ if (pdev->dma_mask && pdev->dma_mask < DMA_BIT_MASK(32))
+ return 0;
+
if (using_dac &&
!pci_set_dma_mask(pdev, DMA_BIT_MASK(64))) {
rc = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
@@ -1026,6 +1037,7 @@ static int ahci_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
struct ahci_host_priv *hpriv;
struct ata_host *host;
int n_ports, i, rc;
+ int ahci_pci_bar = AHCI_PCI_BAR_STANDARD;
VPRINTK("ENTER\n");
@@ -1057,6 +1069,10 @@ static int ahci_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
dev_info(&pdev->dev,
"PDC42819 can only drive SATA devices with this driver\n");
+ /* The Connext uses non-standard BAR */
+ if (pdev->vendor == PCI_VENDOR_ID_STMICRO && pdev->device == 0xCC06)
+ ahci_pci_bar = AHCI_PCI_BAR_STA2X11;
+
/* acquire resources */
rc = pcim_enable_device(pdev);
if (rc)
@@ -1065,7 +1081,7 @@ static int ahci_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
/* AHCI controllers often implement SFF compatible interface.
* Grab all PCI BARs just in case.
*/
- rc = pcim_iomap_regions_request_all(pdev, 1 << AHCI_PCI_BAR, DRV_NAME);
+ rc = pcim_iomap_regions_request_all(pdev, 1 << ahci_pci_bar, DRV_NAME);
if (rc == -EBUSY)
pcim_pin_device(pdev);
if (rc)
@@ -1108,7 +1124,7 @@ static int ahci_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
if ((hpriv->flags & AHCI_HFLAG_NO_MSI) || pci_enable_msi(pdev))
pci_intx(pdev, 1);
- hpriv->mmio = pcim_iomap_table(pdev)[AHCI_PCI_BAR];
+ hpriv->mmio = pcim_iomap_table(pdev)[ahci_pci_bar];
/* save initial config */
ahci_pci_save_initial_config(pdev, hpriv);
@@ -1172,8 +1188,8 @@ static int ahci_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
for (i = 0; i < host->n_ports; i++) {
struct ata_port *ap = host->ports[i];
- ata_port_pbar_desc(ap, AHCI_PCI_BAR, -1, "abar");
- ata_port_pbar_desc(ap, AHCI_PCI_BAR,
+ ata_port_pbar_desc(ap, ahci_pci_bar, -1, "abar");
+ ata_port_pbar_desc(ap, ahci_pci_bar,
0x100 + ap->port_no * 0x80, "port");
/* set enclosure management message type */
diff --git a/drivers/ata/ahci_platform.c b/drivers/ata/ahci_platform.c
index 43b8758..48be4e1 100644
--- a/drivers/ata/ahci_platform.c
+++ b/drivers/ata/ahci_platform.c
@@ -202,6 +202,71 @@ static int __devexit ahci_remove(struct platform_device *pdev)
return 0;
}
+#ifdef CONFIG_PM
+static int ahci_suspend(struct device *dev)
+{
+ struct ahci_platform_data *pdata = dev_get_platdata(dev);
+ struct ata_host *host = dev_get_drvdata(dev);
+ struct ahci_host_priv *hpriv = host->private_data;
+ void __iomem *mmio = hpriv->mmio;
+ u32 ctl;
+ int rc;
+
+ if (hpriv->flags & AHCI_HFLAG_NO_SUSPEND) {
+ dev_err(dev, "firmware update required for suspend/resume\n");
+ return -EIO;
+ }
+
+ /*
+ * AHCI spec rev1.1 section 8.3.3:
+ * Software must disable interrupts prior to requesting a
+ * transition of the HBA to D3 state.
+ */
+ ctl = readl(mmio + HOST_CTL);
+ ctl &= ~HOST_IRQ_EN;
+ writel(ctl, mmio + HOST_CTL);
+ readl(mmio + HOST_CTL); /* flush */
+
+ rc = ata_host_suspend(host, PMSG_SUSPEND);
+ if (rc)
+ return rc;
+
+ if (pdata && pdata->suspend)
+ return pdata->suspend(dev);
+ return 0;
+}
+
+static int ahci_resume(struct device *dev)
+{
+ struct ahci_platform_data *pdata = dev_get_platdata(dev);
+ struct ata_host *host = dev_get_drvdata(dev);
+ int rc;
+
+ if (pdata && pdata->resume) {
+ rc = pdata->resume(dev);
+ if (rc)
+ return rc;
+ }
+
+ if (dev->power.power_state.event == PM_EVENT_SUSPEND) {
+ rc = ahci_reset_controller(host);
+ if (rc)
+ return rc;
+
+ ahci_init_controller(host);
+ }
+
+ ata_host_resume(host);
+
+ return 0;
+}
+
+static struct dev_pm_ops ahci_pm_ops = {
+ .suspend = &ahci_suspend,
+ .resume = &ahci_resume,
+};
+#endif
+
static const struct of_device_id ahci_of_match[] = {
{ .compatible = "calxeda,hb-ahci", },
{},
@@ -214,6 +279,9 @@ static struct platform_driver ahci_driver = {
.name = "ahci",
.owner = THIS_MODULE,
.of_match_table = ahci_of_match,
+#ifdef CONFIG_PM
+ .pm = &ahci_pm_ops,
+#endif
},
.id_table = ahci_devtype,
};
diff --git a/drivers/ata/libahci.c b/drivers/ata/libahci.c
index 3c92dbd..a72bfd0 100644
--- a/drivers/ata/libahci.c
+++ b/drivers/ata/libahci.c
@@ -746,9 +746,6 @@ static void ahci_start_port(struct ata_port *ap)
/* enable FIS reception */
ahci_start_fis_rx(ap);
- /* enable DMA */
- ahci_start_engine(ap);
-
/* turn on LEDs */
if (ap->flags & ATA_FLAG_EM) {
ata_for_each_link(link, ap, EDGE) {
@@ -2022,7 +2019,7 @@ static int ahci_port_suspend(struct ata_port *ap, pm_message_t mesg)
ahci_power_down(ap);
else {
ata_port_err(ap, "%s (%d)\n", emsg, rc);
- ahci_start_port(ap);
+ ata_port_freeze(ap);
}
return rc;
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index c04ad68..11c9aea 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -66,6 +66,7 @@
#include <asm/byteorder.h>
#include <linux/cdrom.h>
#include <linux/ratelimit.h>
+#include <linux/pm_runtime.h>
#include "libata.h"
#include "libata-transport.h"
@@ -3248,10 +3249,10 @@ int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev)
ata_force_xfermask(dev);
pio_mask = ata_pack_xfermask(dev->pio_mask, 0, 0);
- dma_mask = ata_pack_xfermask(0, dev->mwdma_mask, dev->udma_mask);
if (libata_dma_mask & mode_mask)
- dma_mask = ata_pack_xfermask(0, dev->mwdma_mask, dev->udma_mask);
+ dma_mask = ata_pack_xfermask(0, dev->mwdma_mask,
+ dev->udma_mask);
else
dma_mask = 0;
@@ -5234,73 +5235,55 @@ bool ata_link_offline(struct ata_link *link)
}
#ifdef CONFIG_PM
-static int ata_host_request_pm(struct ata_host *host, pm_message_t mesg,
+static int ata_port_request_pm(struct ata_port *ap, pm_message_t mesg,
unsigned int action, unsigned int ehi_flags,
int wait)
{
+ struct ata_link *link;
unsigned long flags;
- int i, rc;
-
- for (i = 0; i < host->n_ports; i++) {
- struct ata_port *ap = host->ports[i];
- struct ata_link *link;
+ int rc;
- /* Previous resume operation might still be in
- * progress. Wait for PM_PENDING to clear.
- */
- if (ap->pflags & ATA_PFLAG_PM_PENDING) {
- ata_port_wait_eh(ap);
- WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING);
- }
+ /* Previous resume operation might still be in
+ * progress. Wait for PM_PENDING to clear.
+ */
+ if (ap->pflags & ATA_PFLAG_PM_PENDING) {
+ ata_port_wait_eh(ap);
+ WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING);
+ }
- /* request PM ops to EH */
- spin_lock_irqsave(ap->lock, flags);
+ /* request PM ops to EH */
+ spin_lock_irqsave(ap->lock, flags);
- ap->pm_mesg = mesg;
- if (wait) {
- rc = 0;
- ap->pm_result = &rc;
- }
+ ap->pm_mesg = mesg;
+ if (wait) {
+ rc = 0;
+ ap->pm_result = &rc;
+ }
- ap->pflags |= ATA_PFLAG_PM_PENDING;
- ata_for_each_link(link, ap, HOST_FIRST) {
- link->eh_info.action |= action;
- link->eh_info.flags |= ehi_flags;
- }
+ ap->pflags |= ATA_PFLAG_PM_PENDING;
+ ata_for_each_link(link, ap, HOST_FIRST) {
+ link->eh_info.action |= action;
+ link->eh_info.flags |= ehi_flags;
+ }
- ata_port_schedule_eh(ap);
+ ata_port_schedule_eh(ap);
- spin_unlock_irqrestore(ap->lock, flags);
+ spin_unlock_irqrestore(ap->lock, flags);
- /* wait and check result */
- if (wait) {
- ata_port_wait_eh(ap);
- WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING);
- if (rc)
- return rc;
- }
+ /* wait and check result */
+ if (wait) {
+ ata_port_wait_eh(ap);
+ WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING);
}
- return 0;
+ return rc;
}
-/**
- * ata_host_suspend - suspend host
- * @host: host to suspend
- * @mesg: PM message
- *
- * Suspend @host. Actual operation is performed by EH. This
- * function requests EH to perform PM operations and waits for EH
- * to finish.
- *
- * LOCKING:
- * Kernel thread context (may sleep).
- *
- * RETURNS:
- * 0 on success, -errno on failure.
- */
-int ata_host_suspend(struct ata_host *host, pm_message_t mesg)
+#define to_ata_port(d) container_of(d, struct ata_port, tdev)
+
+static int ata_port_suspend_common(struct device *dev, pm_message_t mesg)
{
+ struct ata_port *ap = to_ata_port(dev);
unsigned int ehi_flags = ATA_EHI_QUIET;
int rc;
@@ -5315,31 +5298,108 @@ int ata_host_suspend(struct ata_host *host, pm_message_t mesg)
if (mesg.event == PM_EVENT_SUSPEND)
ehi_flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_NO_RECOVERY;
- rc = ata_host_request_pm(host, mesg, 0, ehi_flags, 1);
- if (rc == 0)
- host->dev->power.power_state = mesg;
+ rc = ata_port_request_pm(ap, mesg, 0, ehi_flags, 1);
return rc;
}
+static int ata_port_suspend(struct device *dev)
+{
+ if (pm_runtime_suspended(dev))
+ return 0;
+
+ return ata_port_suspend_common(dev, PMSG_SUSPEND);
+}
+
+static int ata_port_do_freeze(struct device *dev)
+{
+ if (pm_runtime_suspended(dev))
+ pm_runtime_resume(dev);
+
+ return ata_port_suspend_common(dev, PMSG_FREEZE);
+}
+
+static int ata_port_poweroff(struct device *dev)
+{
+ if (pm_runtime_suspended(dev))
+ return 0;
+
+ return ata_port_suspend_common(dev, PMSG_HIBERNATE);
+}
+
+static int ata_port_resume_common(struct device *dev)
+{
+ struct ata_port *ap = to_ata_port(dev);
+ int rc;
+
+ rc = ata_port_request_pm(ap, PMSG_ON, ATA_EH_RESET,
+ ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET, 1);
+ return rc;
+}
+
+static int ata_port_resume(struct device *dev)
+{
+ int rc;
+
+ rc = ata_port_resume_common(dev);
+ if (!rc) {
+ pm_runtime_disable(dev);
+ pm_runtime_set_active(dev);
+ pm_runtime_enable(dev);
+ }
+
+ return rc;
+}
+
+static int ata_port_runtime_idle(struct device *dev)
+{
+ return pm_runtime_suspend(dev);
+}
+
+static const struct dev_pm_ops ata_port_pm_ops = {
+ .suspend = ata_port_suspend,
+ .resume = ata_port_resume,
+ .freeze = ata_port_do_freeze,
+ .thaw = ata_port_resume,
+ .poweroff = ata_port_poweroff,
+ .restore = ata_port_resume,
+
+ .runtime_suspend = ata_port_suspend,
+ .runtime_resume = ata_port_resume_common,
+ .runtime_idle = ata_port_runtime_idle,
+};
+
+/**
+ * ata_host_suspend - suspend host
+ * @host: host to suspend
+ * @mesg: PM message
+ *
+ * Suspend @host. Actual operation is performed by port suspend.
+ */
+int ata_host_suspend(struct ata_host *host, pm_message_t mesg)
+{
+ host->dev->power.power_state = mesg;
+ return 0;
+}
+
/**
* ata_host_resume - resume host
* @host: host to resume
*
- * Resume @host. Actual operation is performed by EH. This
- * function requests EH to perform PM operations and returns.
- * Note that all resume operations are performed parallelly.
- *
- * LOCKING:
- * Kernel thread context (may sleep).
+ * Resume @host. Actual operation is performed by port resume.
*/
void ata_host_resume(struct ata_host *host)
{
- ata_host_request_pm(host, PMSG_ON, ATA_EH_RESET,
- ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET, 0);
host->dev->power.power_state = PMSG_ON;
}
#endif
+struct device_type ata_port_type = {
+ .name = "ata_port",
+#ifdef CONFIG_PM
+ .pm = &ata_port_pm_ops,
+#endif
+};
+
/**
* ata_dev_init - Initialize an ata_device structure
* @dev: Device structure to initialize
diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c
index 2a5412e..508a60b 100644
--- a/drivers/ata/libata-scsi.c
+++ b/drivers/ata/libata-scsi.c
@@ -3381,6 +3381,7 @@ int ata_scsi_add_hosts(struct ata_host *host, struct scsi_host_template *sht)
if (!shost)
goto err_alloc;
+ shost->eh_noresume = 1;
*(struct ata_port **)&shost->hostdata[0] = ap;
ap->scsi_host = shost;
@@ -3398,7 +3399,7 @@ int ata_scsi_add_hosts(struct ata_host *host, struct scsi_host_template *sht)
*/
shost->max_host_blocked = 1;
- rc = scsi_add_host(ap->scsi_host, ap->host->dev);
+ rc = scsi_add_host(ap->scsi_host, &ap->tdev);
if (rc)
goto err_add;
}
diff --git a/drivers/ata/libata-sff.c b/drivers/ata/libata-sff.c
index 4cadfa2..9691dd0 100644
--- a/drivers/ata/libata-sff.c
+++ b/drivers/ata/libata-sff.c
@@ -929,11 +929,11 @@ static void atapi_pio_bytes(struct ata_queued_cmd *qc)
bytes = (bc_hi << 8) | bc_lo;
/* shall be cleared to zero, indicating xfer of data */
- if (unlikely(ireason & (1 << 0)))
+ if (unlikely(ireason & ATAPI_COD))
goto atapi_check;
/* make sure transfer direction matches expected */
- i_write = ((ireason & (1 << 1)) == 0) ? 1 : 0;
+ i_write = ((ireason & ATAPI_IO) == 0) ? 1 : 0;
if (unlikely(do_write != i_write))
goto atapi_check;
diff --git a/drivers/ata/libata-transport.c b/drivers/ata/libata-transport.c
index ce9dc62..9a7f0ea 100644
--- a/drivers/ata/libata-transport.c
+++ b/drivers/ata/libata-transport.c
@@ -32,6 +32,7 @@
#include <linux/libata.h>
#include <linux/hdreg.h>
#include <linux/uaccess.h>
+#include <linux/pm_runtime.h>
#include "libata.h"
#include "libata-transport.h"
@@ -279,6 +280,7 @@ int ata_tport_add(struct device *parent,
struct device *dev = &ap->tdev;
device_initialize(dev);
+ dev->type = &ata_port_type;
dev->parent = get_device(parent);
dev->release = ata_tport_release;
@@ -289,6 +291,9 @@ int ata_tport_add(struct device *parent,
goto tport_err;
}
+ pm_runtime_set_active(dev);
+ pm_runtime_enable(dev);
+
transport_add_device(dev);
transport_configure_device(dev);
diff --git a/drivers/ata/libata.h b/drivers/ata/libata.h
index 773de97..814486d 100644
--- a/drivers/ata/libata.h
+++ b/drivers/ata/libata.h
@@ -58,6 +58,7 @@ extern int atapi_passthru16;
extern int libata_fua;
extern int libata_noacpi;
extern int libata_allow_tpm;
+extern struct device_type ata_port_type;
extern struct ata_link *ata_dev_phys_link(struct ata_device *dev);
extern void ata_force_cbl(struct ata_port *ap);
extern u64 ata_tf_to_lba(const struct ata_taskfile *tf);
diff --git a/drivers/ata/pata_arasan_cf.c b/drivers/ata/pata_arasan_cf.c
index e8574bb..048589f 100644
--- a/drivers/ata/pata_arasan_cf.c
+++ b/drivers/ata/pata_arasan_cf.c
@@ -963,17 +963,7 @@ static struct platform_driver arasan_cf_driver = {
},
};
-static int __init arasan_cf_init(void)
-{
- return platform_driver_register(&arasan_cf_driver);
-}
-module_init(arasan_cf_init);
-
-static void __exit arasan_cf_exit(void)
-{
- platform_driver_unregister(&arasan_cf_driver);
-}
-module_exit(arasan_cf_exit);
+module_platform_driver(arasan_cf_driver);
MODULE_AUTHOR("Viresh Kumar <viresh.kumar@...com>");
MODULE_DESCRIPTION("Arasan ATA Compact Flash driver");
diff --git a/drivers/ata/pata_at91.c b/drivers/ata/pata_at91.c
index a76f24a..d56dd45 100644
--- a/drivers/ata/pata_at91.c
+++ b/drivers/ata/pata_at91.c
@@ -454,20 +454,7 @@ static struct platform_driver pata_at91_driver = {
},
};
-static int __init pata_at91_init(void)
-{
- return platform_driver_register(&pata_at91_driver);
-}
-
-static void __exit pata_at91_exit(void)
-{
- platform_driver_unregister(&pata_at91_driver);
-}
-
-
-module_init(pata_at91_init);
-module_exit(pata_at91_exit);
-
+module_platform_driver(pata_at91_driver);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Driver for CF in True IDE mode on AT91SAM9260 SoC");
diff --git a/drivers/ata/pata_bf54x.c b/drivers/ata/pata_bf54x.c
index bd987bb..d6a4677 100644
--- a/drivers/ata/pata_bf54x.c
+++ b/drivers/ata/pata_bf54x.c
@@ -418,14 +418,6 @@ static void bfin_set_dmamode(struct ata_port *ap, struct ata_device *adev)
(tcyc_tdvs<<8 | tdvs));
ATAPI_SET_ULTRA_TIM_2(base, (tmli<<8 | tss));
ATAPI_SET_ULTRA_TIM_3(base, (trp<<8 | tzah));
-
- /* Enable host ATAPI Untra DMA interrupts */
- ATAPI_SET_INT_MASK(base,
- ATAPI_GET_INT_MASK(base)
- | UDMAIN_DONE_MASK
- | UDMAOUT_DONE_MASK
- | UDMAIN_TERM_MASK
- | UDMAOUT_TERM_MASK);
}
}
}
@@ -470,10 +462,6 @@ static void bfin_set_dmamode(struct ata_port *ap, struct ata_device *adev)
ATAPI_SET_MULTI_TIM_0(base, (tm<<8 | td));
ATAPI_SET_MULTI_TIM_1(base, (tkr<<8 | tkw));
ATAPI_SET_MULTI_TIM_2(base, (teoc<<8 | th));
-
- /* Enable host ATAPI Multi DMA interrupts */
- ATAPI_SET_INT_MASK(base, ATAPI_GET_INT_MASK(base)
- | MULTI_DONE_MASK | MULTI_TERM_MASK);
SSYNC();
}
}
@@ -1153,15 +1141,11 @@ static unsigned char bfin_bmdma_status(struct ata_port *ap)
{
unsigned char host_stat = 0;
void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
- unsigned short int_status = ATAPI_GET_INT_STATUS(base);
- if (ATAPI_GET_STATUS(base) & (MULTI_XFER_ON|ULTRA_XFER_ON))
+ if (ATAPI_GET_STATUS(base) & (MULTI_XFER_ON | ULTRA_XFER_ON))
host_stat |= ATA_DMA_ACTIVE;
- if (int_status & (MULTI_DONE_INT|UDMAIN_DONE_INT|UDMAOUT_DONE_INT|
- ATAPI_DEV_INT))
+ if (ATAPI_GET_INT_STATUS(base) & ATAPI_DEV_INT)
host_stat |= ATA_DMA_INTR;
- if (int_status & (MULTI_TERM_INT|UDMAIN_TERM_INT|UDMAOUT_TERM_INT))
- host_stat |= ATA_DMA_ERR|ATA_DMA_INTR;
dev_dbg(ap->dev, "ATAPI: host_stat=0x%x\n", host_stat);
diff --git a/drivers/ata/pata_cs5536.c b/drivers/ata/pata_cs5536.c
index 628c8fa..7a402c7 100644
--- a/drivers/ata/pata_cs5536.c
+++ b/drivers/ata/pata_cs5536.c
@@ -1,6 +1,7 @@
/*
* pata_cs5536.c - CS5536 PATA for new ATA layer
* (C) 2007 Martin K. Petersen <mkp@....net>
+ * (C) 2011 Bartlomiej Zolnierkiewicz
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
@@ -55,24 +56,16 @@ MODULE_PARM_DESC(msr, "Force using MSR to configure IDE function (Default: 0)");
#define DRV_VERSION "0.0.8"
enum {
- CFG = 0,
- DTC = 1,
- CAST = 2,
- ETC = 3,
-
- MSR_IDE_BASE = 0x51300000,
- MSR_IDE_CFG = (MSR_IDE_BASE + 0x10),
- MSR_IDE_DTC = (MSR_IDE_BASE + 0x12),
- MSR_IDE_CAST = (MSR_IDE_BASE + 0x13),
- MSR_IDE_ETC = (MSR_IDE_BASE + 0x14),
-
+ MSR_IDE_CFG = 0x51300010,
PCI_IDE_CFG = 0x40,
- PCI_IDE_DTC = 0x48,
- PCI_IDE_CAST = 0x4c,
- PCI_IDE_ETC = 0x50,
- IDE_CFG_CHANEN = 0x2,
- IDE_CFG_CABLE = 0x10000,
+ CFG = 0,
+ DTC = 2,
+ CAST = 3,
+ ETC = 4,
+
+ IDE_CFG_CHANEN = (1 << 1),
+ IDE_CFG_CABLE = (1 << 17) | (1 << 16),
IDE_D0_SHIFT = 24,
IDE_D1_SHIFT = 16,
@@ -84,45 +77,50 @@ enum {
IDE_CAST_CMD_MASK = 0xff,
IDE_CAST_CMD_SHIFT = 24,
- IDE_ETC_NODMA = 0x03,
-};
-
-static const u32 msr_reg[4] = {
- MSR_IDE_CFG, MSR_IDE_DTC, MSR_IDE_CAST, MSR_IDE_ETC,
-};
-
-static const u8 pci_reg[4] = {
- PCI_IDE_CFG, PCI_IDE_DTC, PCI_IDE_CAST, PCI_IDE_ETC,
+ IDE_ETC_UDMA_MASK = 0xc0,
};
-static inline int cs5536_read(struct pci_dev *pdev, int reg, u32 *val)
+static int cs5536_read(struct pci_dev *pdev, int reg, u32 *val)
{
if (unlikely(use_msr)) {
u32 dummy __maybe_unused;
- rdmsr(msr_reg[reg], *val, dummy);
+ rdmsr(MSR_IDE_CFG + reg, *val, dummy);
return 0;
}
- return pci_read_config_dword(pdev, pci_reg[reg], val);
+ return pci_read_config_dword(pdev, PCI_IDE_CFG + reg * 4, val);
}
-static inline int cs5536_write(struct pci_dev *pdev, int reg, int val)
+static int cs5536_write(struct pci_dev *pdev, int reg, int val)
{
if (unlikely(use_msr)) {
- wrmsr(msr_reg[reg], val, 0);
+ wrmsr(MSR_IDE_CFG + reg, val, 0);
return 0;
}
- return pci_write_config_dword(pdev, pci_reg[reg], val);
+ return pci_write_config_dword(pdev, PCI_IDE_CFG + reg * 4, val);
+}
+
+static void cs5536_program_dtc(struct ata_device *adev, u8 tim)
+{
+ struct pci_dev *pdev = to_pci_dev(adev->link->ap->host->dev);
+ int dshift = adev->devno ? IDE_D1_SHIFT : IDE_D0_SHIFT;
+ u32 dtc;
+
+ cs5536_read(pdev, DTC, &dtc);
+ dtc &= ~(IDE_DRV_MASK << dshift);
+ dtc |= tim << dshift;
+ cs5536_write(pdev, DTC, dtc);
}
/**
* cs5536_cable_detect - detect cable type
* @ap: Port to detect on
*
- * Perform cable detection for ATA66 capable cable. Return a libata
- * cable type.
+ * Perform cable detection for ATA66 capable cable.
+ *
+ * Returns a cable type.
*/
static int cs5536_cable_detect(struct ata_port *ap)
@@ -132,7 +130,7 @@ static int cs5536_cable_detect(struct ata_port *ap)
cs5536_read(pdev, CFG, &cfg);
- if (cfg & (IDE_CFG_CABLE << ap->port_no))
+ if (cfg & IDE_CFG_CABLE)
return ATA_CBL_PATA80;
else
return ATA_CBL_PATA40;
@@ -162,19 +160,15 @@ static void cs5536_set_piomode(struct ata_port *ap, struct ata_device *adev)
struct ata_device *pair = ata_dev_pair(adev);
int mode = adev->pio_mode - XFER_PIO_0;
int cmdmode = mode;
- int dshift = adev->devno ? IDE_D1_SHIFT : IDE_D0_SHIFT;
int cshift = adev->devno ? IDE_CAST_D1_SHIFT : IDE_CAST_D0_SHIFT;
- u32 dtc, cast, etc;
+ u32 cast;
if (pair)
cmdmode = min(mode, pair->pio_mode - XFER_PIO_0);
- cs5536_read(pdev, DTC, &dtc);
- cs5536_read(pdev, CAST, &cast);
- cs5536_read(pdev, ETC, &etc);
+ cs5536_program_dtc(adev, drv_timings[mode]);
- dtc &= ~(IDE_DRV_MASK << dshift);
- dtc |= drv_timings[mode] << dshift;
+ cs5536_read(pdev, CAST, &cast);
cast &= ~(IDE_CAST_DRV_MASK << cshift);
cast |= addr_timings[mode] << cshift;
@@ -182,12 +176,7 @@ static void cs5536_set_piomode(struct ata_port *ap, struct ata_device *adev)
cast &= ~(IDE_CAST_CMD_MASK << IDE_CAST_CMD_SHIFT);
cast |= cmd_timings[cmdmode] << IDE_CAST_CMD_SHIFT;
- etc &= ~(IDE_DRV_MASK << dshift);
- etc |= IDE_ETC_NODMA << dshift;
-
- cs5536_write(pdev, DTC, dtc);
cs5536_write(pdev, CAST, cast);
- cs5536_write(pdev, ETC, etc);
}
/**
@@ -208,25 +197,21 @@ static void cs5536_set_dmamode(struct ata_port *ap, struct ata_device *adev)
};
struct pci_dev *pdev = to_pci_dev(ap->host->dev);
- u32 dtc, etc;
+ u32 etc;
int mode = adev->dma_mode;
int dshift = adev->devno ? IDE_D1_SHIFT : IDE_D0_SHIFT;
- if (mode >= XFER_UDMA_0) {
- cs5536_read(pdev, ETC, &etc);
+ cs5536_read(pdev, ETC, &etc);
+ if (mode >= XFER_UDMA_0) {
etc &= ~(IDE_DRV_MASK << dshift);
etc |= udma_timings[mode - XFER_UDMA_0] << dshift;
-
- cs5536_write(pdev, ETC, etc);
} else { /* MWDMA */
- cs5536_read(pdev, DTC, &dtc);
-
- dtc &= ~(IDE_DRV_MASK << dshift);
- dtc |= mwdma_timings[mode - XFER_MW_DMA_0] << dshift;
-
- cs5536_write(pdev, DTC, dtc);
+ etc &= ~(IDE_ETC_UDMA_MASK << dshift);
+ cs5536_program_dtc(adev, mwdma_timings[mode - XFER_MW_DMA_0]);
}
+
+ cs5536_write(pdev, ETC, etc);
}
static struct scsi_host_template cs5536_sht = {
diff --git a/drivers/ata/pata_imx.c b/drivers/ata/pata_imx.c
index ca9d9ca..c5af97f 100644
--- a/drivers/ata/pata_imx.c
+++ b/drivers/ata/pata_imx.c
@@ -235,17 +235,7 @@ static struct platform_driver pata_imx_driver = {
},
};
-static int __init pata_imx_init(void)
-{
- return platform_driver_register(&pata_imx_driver);
-}
-
-static void __exit pata_imx_exit(void)
-{
- platform_driver_unregister(&pata_imx_driver);
-}
-module_init(pata_imx_init);
-module_exit(pata_imx_exit);
+module_platform_driver(pata_imx_driver);
MODULE_AUTHOR("Arnaud Patard <arnaud.patard@...-net.org>");
MODULE_DESCRIPTION("low-level driver for iMX PATA");
diff --git a/drivers/ata/pata_ixp4xx_cf.c b/drivers/ata/pata_ixp4xx_cf.c
index 15b6431..badb178 100644
--- a/drivers/ata/pata_ixp4xx_cf.c
+++ b/drivers/ata/pata_ixp4xx_cf.c
@@ -205,21 +205,10 @@ static struct platform_driver ixp4xx_pata_platform_driver = {
.remove = __devexit_p(ixp4xx_pata_remove),
};
-static int __init ixp4xx_pata_init(void)
-{
- return platform_driver_register(&ixp4xx_pata_platform_driver);
-}
-
-static void __exit ixp4xx_pata_exit(void)
-{
- platform_driver_unregister(&ixp4xx_pata_platform_driver);
-}
+module_platform_driver(ixp4xx_pata_platform_driver);
MODULE_AUTHOR("Alessandro Zummo <a.zummo@...ertech.it>");
MODULE_DESCRIPTION("low-level driver for ixp4xx Compact Flash PATA");
MODULE_LICENSE("GPL");
MODULE_VERSION(DRV_VERSION);
MODULE_ALIAS("platform:" DRV_NAME);
-
-module_init(ixp4xx_pata_init);
-module_exit(ixp4xx_pata_exit);
diff --git a/drivers/ata/pata_mpc52xx.c b/drivers/ata/pata_mpc52xx.c
index 3e17463..00748ae 100644
--- a/drivers/ata/pata_mpc52xx.c
+++ b/drivers/ata/pata_mpc52xx.c
@@ -897,26 +897,7 @@ static struct platform_driver mpc52xx_ata_of_platform_driver = {
},
};
-
-/* ======================================================================== */
-/* Module */
-/* ======================================================================== */
-
-static int __init
-mpc52xx_ata_init(void)
-{
- printk(KERN_INFO "ata: MPC52xx IDE/ATA libata driver\n");
- return platform_driver_register(&mpc52xx_ata_of_platform_driver);
-}
-
-static void __exit
-mpc52xx_ata_exit(void)
-{
- platform_driver_unregister(&mpc52xx_ata_of_platform_driver);
-}
-
-module_init(mpc52xx_ata_init);
-module_exit(mpc52xx_ata_exit);
+module_platform_driver(mpc52xx_ata_of_platform_driver);
MODULE_AUTHOR("Sylvain Munaut <tnt@...tNt.com>");
MODULE_DESCRIPTION("Freescale MPC52xx IDE/ATA libata driver");
diff --git a/drivers/ata/pata_of_platform.c b/drivers/ata/pata_of_platform.c
index 2a472c5..1654dc2 100644
--- a/drivers/ata/pata_of_platform.c
+++ b/drivers/ata/pata_of_platform.c
@@ -12,8 +12,7 @@
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/of_address.h>
-#include <linux/of_irq.h>
-#include <linux/of_platform.h>
+#include <linux/platform_device.h>
#include <linux/ata_platform.h>
static int __devinit pata_of_platform_probe(struct platform_device *ofdev)
@@ -22,7 +21,7 @@ static int __devinit pata_of_platform_probe(struct platform_device *ofdev)
struct device_node *dn = ofdev->dev.of_node;
struct resource io_res;
struct resource ctl_res;
- struct resource irq_res;
+ struct resource *irq_res;
unsigned int reg_shift = 0;
int pio_mode = 0;
int pio_mask;
@@ -51,11 +50,9 @@ static int __devinit pata_of_platform_probe(struct platform_device *ofdev)
}
}
- ret = of_irq_to_resource(dn, 0, &irq_res);
- if (!ret)
- irq_res.start = irq_res.end = 0;
- else
- irq_res.flags = 0;
+ irq_res = platform_get_resource(ofdev, IORESOURCE_IRQ, 0);
+ if (irq_res)
+ irq_res->flags = 0;
prop = of_get_property(dn, "reg-shift", NULL);
if (prop)
@@ -75,7 +72,7 @@ static int __devinit pata_of_platform_probe(struct platform_device *ofdev)
pio_mask = 1 << pio_mode;
pio_mask |= (1 << pio_mode) - 1;
- return __pata_platform_probe(&ofdev->dev, &io_res, &ctl_res, &irq_res,
+ return __pata_platform_probe(&ofdev->dev, &io_res, &ctl_res, irq_res,
reg_shift, pio_mask);
}
@@ -101,17 +98,7 @@ static struct platform_driver pata_of_platform_driver = {
.remove = __devexit_p(pata_of_platform_remove),
};
-static int __init pata_of_platform_init(void)
-{
- return platform_driver_register(&pata_of_platform_driver);
-}
-module_init(pata_of_platform_init);
-
-static void __exit pata_of_platform_exit(void)
-{
- platform_driver_unregister(&pata_of_platform_driver);
-}
-module_exit(pata_of_platform_exit);
+module_platform_driver(pata_of_platform_driver);
MODULE_DESCRIPTION("OF-platform PATA driver");
MODULE_AUTHOR("Anton Vorontsov <avorontsov@...mvista.com>");
diff --git a/drivers/ata/pata_palmld.c b/drivers/ata/pata_palmld.c
index b86d7e2..5ff31b6 100644
--- a/drivers/ata/pata_palmld.c
+++ b/drivers/ata/pata_palmld.c
@@ -132,20 +132,9 @@ static struct platform_driver palmld_pata_platform_driver = {
.remove = __devexit_p(palmld_pata_remove),
};
-static int __init palmld_pata_init(void)
-{
- return platform_driver_register(&palmld_pata_platform_driver);
-}
-
-static void __exit palmld_pata_exit(void)
-{
- platform_driver_unregister(&palmld_pata_platform_driver);
-}
+module_platform_driver(palmld_pata_platform_driver);
MODULE_AUTHOR("Marek Vasut <marek.vasut@...il.com>");
MODULE_DESCRIPTION("PalmLD PATA driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:" DRV_NAME);
-
-module_init(palmld_pata_init);
-module_exit(palmld_pata_exit);
diff --git a/drivers/ata/pata_platform.c b/drivers/ata/pata_platform.c
index 2067308..f1848ae 100644
--- a/drivers/ata/pata_platform.c
+++ b/drivers/ata/pata_platform.c
@@ -256,17 +256,7 @@ static struct platform_driver pata_platform_driver = {
},
};
-static int __init pata_platform_init(void)
-{
- return platform_driver_register(&pata_platform_driver);
-}
-
-static void __exit pata_platform_exit(void)
-{
- platform_driver_unregister(&pata_platform_driver);
-}
-module_init(pata_platform_init);
-module_exit(pata_platform_exit);
+module_platform_driver(pata_platform_driver);
module_param(pio_mask, int, 0);
diff --git a/drivers/ata/pata_pxa.c b/drivers/ata/pata_pxa.c
index b4ede40..0bb0fb7 100644
--- a/drivers/ata/pata_pxa.c
+++ b/drivers/ata/pata_pxa.c
@@ -390,18 +390,7 @@ static struct platform_driver pxa_ata_driver = {
},
};
-static int __init pxa_ata_init(void)
-{
- return platform_driver_register(&pxa_ata_driver);
-}
-
-static void __exit pxa_ata_exit(void)
-{
- platform_driver_unregister(&pxa_ata_driver);
-}
-
-module_init(pxa_ata_init);
-module_exit(pxa_ata_exit);
+module_platform_driver(pxa_ata_driver);
MODULE_AUTHOR("Marek Vasut <marek.vasut@...il.com>");
MODULE_DESCRIPTION("DMA-capable driver for PATA on PXA CPU");
diff --git a/drivers/ata/pata_rb532_cf.c b/drivers/ata/pata_rb532_cf.c
index 1b9d10d..9417101 100644
--- a/drivers/ata/pata_rb532_cf.c
+++ b/drivers/ata/pata_rb532_cf.c
@@ -188,9 +188,6 @@ static __devexit int rb532_pata_driver_remove(struct platform_device *pdev)
return 0;
}
-/* work with hotplug and coldplug */
-MODULE_ALIAS("platform:" DRV_NAME);
-
static struct platform_driver rb532_pata_platform_driver = {
.probe = rb532_pata_driver_probe,
.remove = __devexit_p(rb532_pata_driver_remove),
@@ -200,27 +197,13 @@ static struct platform_driver rb532_pata_platform_driver = {
},
};
-/* ------------------------------------------------------------------------ */
-
#define DRV_INFO DRV_DESC " version " DRV_VERSION
-static int __init rb532_pata_module_init(void)
-{
- printk(KERN_INFO DRV_INFO "\n");
-
- return platform_driver_register(&rb532_pata_platform_driver);
-}
-
-static void __exit rb532_pata_module_exit(void)
-{
- platform_driver_unregister(&rb532_pata_platform_driver);
-}
+module_platform_driver(rb532_pata_platform_driver);
MODULE_AUTHOR("Gabor Juhos <juhosg at openwrt.org>");
MODULE_AUTHOR("Florian Fainelli <florian@...nwrt.org>");
MODULE_DESCRIPTION(DRV_DESC);
MODULE_VERSION(DRV_VERSION);
MODULE_LICENSE("GPL");
-
-module_init(rb532_pata_module_init);
-module_exit(rb532_pata_module_exit);
+MODULE_ALIAS("platform:" DRV_NAME);
diff --git a/drivers/ata/sata_dwc_460ex.c b/drivers/ata/sata_dwc_460ex.c
index 5c42374..69f7cde 100644
--- a/drivers/ata/sata_dwc_460ex.c
+++ b/drivers/ata/sata_dwc_460ex.c
@@ -1777,18 +1777,7 @@ static struct platform_driver sata_dwc_driver = {
.remove = sata_dwc_remove,
};
-static int __init sata_dwc_init(void)
-{
- return platform_driver_register(&sata_dwc_driver);
-}
-
-static void __exit sata_dwc_exit(void)
-{
- platform_driver_unregister(&sata_dwc_driver);
-}
-
-module_init(sata_dwc_init);
-module_exit(sata_dwc_exit);
+module_platform_driver(sata_dwc_driver);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Mark Miesfeld <mmiesfeld@...c.com>");
diff --git a/drivers/ata/sata_fsl.c b/drivers/ata/sata_fsl.c
index 78ae7b6..5a2c95b 100644
--- a/drivers/ata/sata_fsl.c
+++ b/drivers/ata/sata_fsl.c
@@ -1452,21 +1452,9 @@ static struct platform_driver fsl_sata_driver = {
#endif
};
-static int __init sata_fsl_init(void)
-{
- platform_driver_register(&fsl_sata_driver);
- return 0;
-}
-
-static void __exit sata_fsl_exit(void)
-{
- platform_driver_unregister(&fsl_sata_driver);
-}
+module_platform_driver(fsl_sata_driver);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Ashish Kalra, Freescale Semiconductor");
MODULE_DESCRIPTION("Freescale 3.0Gbps SATA controller low level driver");
MODULE_VERSION("1.10");
-
-module_init(sata_fsl_init);
-module_exit(sata_fsl_exit);
diff --git a/drivers/scsi/scsi_error.c b/drivers/scsi/scsi_error.c
index dc6131e..5f84a14 100644
--- a/drivers/scsi/scsi_error.c
+++ b/drivers/scsi/scsi_error.c
@@ -1812,7 +1812,7 @@ int scsi_error_handler(void *data)
* what we need to do to get it up and online again (if we can).
* If we fail, we end up taking the thing offline.
*/
- if (scsi_autopm_get_host(shost) != 0) {
+ if (!shost->eh_noresume && scsi_autopm_get_host(shost) != 0) {
SCSI_LOG_ERROR_RECOVERY(1,
printk(KERN_ERR "Error handler scsi_eh_%d "
"unable to autoresume\n",
@@ -1833,7 +1833,8 @@ int scsi_error_handler(void *data)
* which are still online.
*/
scsi_restart_operations(shost);
- scsi_autopm_put_host(shost);
+ if (!shost->eh_noresume)
+ scsi_autopm_put_host(shost);
set_current_state(TASK_INTERRUPTIBLE);
}
__set_current_state(TASK_RUNNING);
diff --git a/drivers/scsi/scsi_pm.c b/drivers/scsi/scsi_pm.c
index d329f8b..bf8bf79 100644
--- a/drivers/scsi/scsi_pm.c
+++ b/drivers/scsi/scsi_pm.c
@@ -49,8 +49,22 @@ static int scsi_bus_suspend_common(struct device *dev, pm_message_t msg)
{
int err = 0;
- if (scsi_is_sdev_device(dev))
+ if (scsi_is_sdev_device(dev)) {
+ /*
+ * sd is the only high-level SCSI driver to implement runtime
+ * PM, and sd treats runtime suspend, system suspend, and
+ * system hibernate identically (but not system freeze).
+ */
+ if (pm_runtime_suspended(dev)) {
+ if (msg.event == PM_EVENT_SUSPEND ||
+ msg.event == PM_EVENT_HIBERNATE)
+ return 0; /* already suspended */
+
+ /* wake up device so that FREEZE will succeed */
+ pm_runtime_resume(dev);
+ }
err = scsi_dev_type_suspend(dev, msg);
+ }
return err;
}
@@ -58,8 +72,17 @@ static int scsi_bus_resume_common(struct device *dev)
{
int err = 0;
- if (scsi_is_sdev_device(dev))
+ if (scsi_is_sdev_device(dev)) {
+ /*
+ * Parent device may have runtime suspended as soon as
+ * it is woken up during the system resume.
+ *
+ * Resume it on behalf of child.
+ */
+ pm_runtime_get_sync(dev->parent);
err = scsi_dev_type_resume(dev);
+ pm_runtime_put_sync(dev->parent);
+ }
if (err == 0) {
pm_runtime_disable(dev);
diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
index fa3a591..7b3f807 100644
--- a/drivers/scsi/sd.c
+++ b/drivers/scsi/sd.c
@@ -50,6 +50,7 @@
#include <linux/string_helpers.h>
#include <linux/async.h>
#include <linux/slab.h>
+#include <linux/pm_runtime.h>
#include <asm/uaccess.h>
#include <asm/unaligned.h>
@@ -2741,6 +2742,9 @@ static void sd_shutdown(struct device *dev)
if (!sdkp)
return; /* this can happen */
+ if (pm_runtime_suspended(dev))
+ goto exit;
+
if (sdkp->WCE) {
sd_printk(KERN_NOTICE, sdkp, "Synchronizing SCSI cache\n");
sd_sync_cache(sdkp);
@@ -2751,6 +2755,7 @@ static void sd_shutdown(struct device *dev)
sd_start_stop_device(sdkp, 0);
}
+exit:
scsi_disk_put(sdkp);
}
diff --git a/include/linux/ahci_platform.h b/include/linux/ahci_platform.h
index be3d9a7..73a2500 100644
--- a/include/linux/ahci_platform.h
+++ b/include/linux/ahci_platform.h
@@ -23,6 +23,8 @@ struct ata_port_info;
struct ahci_platform_data {
int (*init)(struct device *dev, void __iomem *addr);
void (*exit)(struct device *dev);
+ int (*suspend)(struct device *dev);
+ int (*resume)(struct device *dev);
const struct ata_port_info *ata_port_info;
unsigned int force_port_map;
unsigned int mask_port_map;
diff --git a/include/scsi/scsi_host.h b/include/scsi/scsi_host.h
index 50266c9..5f7d5b3 100644
--- a/include/scsi/scsi_host.h
+++ b/include/scsi/scsi_host.h
@@ -669,6 +669,9 @@ struct Scsi_Host {
/* Asynchronous scan in progress */
unsigned async_scan:1;
+ /* Don't resume host in EH */
+ unsigned eh_noresume:1;
+
/*
* Optional work queue to be utilized by the transport
*/
--
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