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Date: Sun, 03 Aug 2008 13:05:09 -0500
From: James Bottomley <James.Bottomley@...senPartnership.com>
To: linux-scsi <linux-scsi@...r.kernel.org>,
linux-kernel <linux-kernel@...r.kernel.org>,
linux-pci@...r.kernel.org
Cc: "Moore, Eric" <Eric.Moore@....com>
Subject: [PATCH 2/2] fusion: Implement generic interrupt misroute handling
This patch uses the new pci_lost_interrupt() callback to note the loss
of an interrupt, and if the reason is MSI, to work around the problem.
I used the manufacturer config page for this, because every fusion type
has that one and its loss means that mpt_config() which is interrupt
driven, failed.
James
---
diff --git a/drivers/message/fusion/mptbase.c b/drivers/message/fusion/mptbase.c
index d6a0074..2d75c58 100644
--- a/drivers/message/fusion/mptbase.c
+++ b/drivers/message/fusion/mptbase.c
@@ -168,7 +168,7 @@ static int mpt_readScsiDevicePageHeaders(MPT_ADAPTER *ioc, int portnum);
static void mpt_read_ioc_pg_1(MPT_ADAPTER *ioc);
static void mpt_read_ioc_pg_4(MPT_ADAPTER *ioc);
static void mpt_timer_expired(unsigned long data);
-static void mpt_get_manufacturing_pg_0(MPT_ADAPTER *ioc);
+static int mpt_get_manufacturing_pg_0(MPT_ADAPTER *ioc);
static int SendEventNotification(MPT_ADAPTER *ioc, u8 EvSwitch);
static int SendEventAck(MPT_ADAPTER *ioc, EventNotificationReply_t *evnp);
static int mpt_host_page_access_control(MPT_ADAPTER *ioc, u8 access_control_value, int sleepFlag);
@@ -2052,6 +2052,7 @@ mpt_do_ioc_recovery(MPT_ADAPTER *ioc, u32 reason, int sleepFlag)
int irq_allocated = 0;
u8 *a;
+ retry:
printk(MYIOC_s_INFO_FMT "Initiating %s\n", ioc->name,
reason == MPT_HOSTEVENT_IOC_BRINGUP ? "bringup" : "recovery");
@@ -2268,6 +2269,7 @@ mpt_do_ioc_recovery(MPT_ADAPTER *ioc, u32 reason, int sleepFlag)
* and we try GetLanConfigPages again...
*/
if ((ret == 0) && (reason == MPT_HOSTEVENT_IOC_BRINGUP)) {
+ int rc;
/*
* Initalize link list for inactive raid volumes.
@@ -2275,6 +2277,22 @@ mpt_do_ioc_recovery(MPT_ADAPTER *ioc, u32 reason, int sleepFlag)
mutex_init(&ioc->raid_data.inactive_list_mutex);
INIT_LIST_HEAD(&ioc->raid_data.inactive_list);
+ /* May fail becuase of IRQ misrouting */
+ rc = mpt_get_manufacturing_pg_0(ioc);
+ if (rc) {
+ if (pci_lost_interrupt(ioc->pcidev) ==
+ PCI_LOST_IRQ_DISABLE_MSI) {
+ free_irq(ioc->pci_irq, ioc);
+ ioc->msi_enable = 0;
+ pci_disable_msi(ioc->pcidev);
+ goto retry;
+ }
+ printk(MYIOC_s_ERR_FMT "Cannot recover IRQ routing\n",
+ ioc->name);
+ return -1;
+ }
+
+
if (ioc->bus_type == SAS) {
/* clear persistency table */
@@ -2326,7 +2344,6 @@ mpt_do_ioc_recovery(MPT_ADAPTER *ioc, u32 reason, int sleepFlag)
}
GetIoUnitPage2(ioc);
- mpt_get_manufacturing_pg_0(ioc);
}
/*
@@ -5697,13 +5714,14 @@ mpt_read_ioc_pg_1(MPT_ADAPTER *ioc)
return;
}
-static void
+static int
mpt_get_manufacturing_pg_0(MPT_ADAPTER *ioc)
{
CONFIGPARMS cfg;
ConfigPageHeader_t hdr;
dma_addr_t buf_dma;
ManufacturingPage0_t *pbuf = NULL;
+ int ret;
memset(&cfg, 0 , sizeof(CONFIGPARMS));
memset(&hdr, 0 , sizeof(ConfigPageHeader_t));
@@ -5714,20 +5732,23 @@ mpt_get_manufacturing_pg_0(MPT_ADAPTER *ioc)
cfg.action = MPI_CONFIG_ACTION_PAGE_HEADER;
cfg.timeout = 10;
- if (mpt_config(ioc, &cfg) != 0)
+ ret = mpt_config(ioc, &cfg);
+ if (ret != 0)
goto out;
if (!cfg.cfghdr.hdr->PageLength)
goto out;
cfg.action = MPI_CONFIG_ACTION_PAGE_READ_CURRENT;
+ ret = -ENOMEM;
pbuf = pci_alloc_consistent(ioc->pcidev, hdr.PageLength * 4, &buf_dma);
if (!pbuf)
goto out;
cfg.physAddr = buf_dma;
- if (mpt_config(ioc, &cfg) != 0)
+ ret = mpt_config(ioc, &cfg);
+ if (ret != 0)
goto out;
memcpy(ioc->board_name, pbuf->BoardName, sizeof(ioc->board_name));
@@ -5738,6 +5759,7 @@ mpt_get_manufacturing_pg_0(MPT_ADAPTER *ioc)
if (pbuf)
pci_free_consistent(ioc->pcidev, hdr.PageLength * 4, pbuf, buf_dma);
+ return ret;
}
/*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
--
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