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Date: Sun, 8 Apr 2012 19:29:26 -0700
From: Asai Thambi S P <asamymuthupa@...ron.com>
To: Jens Axboe <axboe@...nel.dk>
CC: "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
Greg KH <greg@...ah.com>, Sam Bradshaw <sbradshaw@...ron.com>
Subject: [PATCH v2 4/7] mtip32xx: misc changes
* Handle the interrupt completion of polled internal commands
* Do not check remove pending flag for standby command
* On rebuild failure,
- set corresponding bit dd_flag
- do not send standby command
* Free ida index in remove path
Signed-off-by: Asai Thambi S P <asamymuthupa@...ron.com>
---
drivers/block/mtip32xx/mtip32xx.c | 66 ++++++++++++++++++++++++------------
1 files changed, 44 insertions(+), 22 deletions(-)
diff --git a/drivers/block/mtip32xx/mtip32xx.c b/drivers/block/mtip32xx/mtip32xx.c
index 79fdb06..be96626 100644
--- a/drivers/block/mtip32xx/mtip32xx.c
+++ b/drivers/block/mtip32xx/mtip32xx.c
@@ -708,6 +708,14 @@ static void mtip_completion(struct mtip_port *port,
complete(waiting);
}
+static void mtip_null_completion(struct mtip_port *port,
+ int tag,
+ void *data,
+ int status)
+{
+ return;
+}
+
/*
* Helper function for tag logging
*/
@@ -992,8 +1000,6 @@ static inline void mtip_process_legacy(struct driver_data *dd, u32 port_stat)
}
}
- dev_warn(&dd->pdev->dev, "IRQ status 0x%x ignored.\n", port_stat);
-
return;
}
@@ -1161,7 +1167,7 @@ static int mtip_quiesce_io(struct mtip_port *port, unsigned long timeout)
* -EAGAIN Time out waiting for command to complete.
*/
static int mtip_exec_internal_command(struct mtip_port *port,
- void *fis,
+ struct host_to_dev_fis *fis,
int fis_len,
dma_addr_t buffer,
int buf_len,
@@ -1190,14 +1196,17 @@ static int mtip_exec_internal_command(struct mtip_port *port,
set_bit(MTIP_FLAG_IC_ACTIVE_BIT, &port->flags);
if (atomic == GFP_KERNEL) {
- /* wait for io to complete if non atomic */
- if (mtip_quiesce_io(port, 5000) < 0) {
- dev_warn(&port->dd->pdev->dev,
- "Failed to quiesce IO\n");
- release_slot(port, MTIP_TAG_INTERNAL);
- clear_bit(MTIP_FLAG_IC_ACTIVE_BIT, &port->flags);
- wake_up_interruptible(&port->svc_wait);
- return -EBUSY;
+ if (fis->command != ATA_CMD_STANDBYNOW1) {
+ /* wait for io to complete if non atomic */
+ if (mtip_quiesce_io(port, 5000) < 0) {
+ dev_warn(&port->dd->pdev->dev,
+ "Failed to quiesce IO\n");
+ release_slot(port, MTIP_TAG_INTERNAL);
+ clear_bit(MTIP_FLAG_IC_ACTIVE_BIT,
+ &port->flags);
+ wake_up_interruptible(&port->svc_wait);
+ return -EBUSY;
+ }
}
/* Set the completion function and data for the command. */
@@ -1207,7 +1216,7 @@ static int mtip_exec_internal_command(struct mtip_port *port,
} else {
/* Clear completion - we're going to poll */
int_cmd->comp_data = NULL;
- int_cmd->comp_func = NULL;
+ int_cmd->comp_func = mtip_null_completion;
}
/* Copy the command to the command table */
@@ -1273,12 +1282,14 @@ static int mtip_exec_internal_command(struct mtip_port *port,
} else {
/* Spin for <timeout> checking if command still outstanding */
timeout = jiffies + msecs_to_jiffies(timeout);
-
- while ((readl(
- port->cmd_issue[MTIP_TAG_INTERNAL])
- & (1 << MTIP_TAG_INTERNAL))
- && time_before(jiffies, timeout)) {
- if (mtip_check_surprise_removal(port->dd->pdev) ||
+ while ((readl(port->cmd_issue[MTIP_TAG_INTERNAL])
+ & (1 << MTIP_TAG_INTERNAL))
+ && time_before(jiffies, timeout)) {
+ if (mtip_check_surprise_removal(port->dd->pdev)) {
+ rv = -ENXIO;
+ goto exec_ic_exit;
+ }
+ if ((fis->command != ATA_CMD_STANDBYNOW1) &&
test_bit(MTIP_DD_FLAG_REMOVE_PENDING_BIT,
&port->dd->dd_flag)) {
rv = -ENXIO;
@@ -1289,8 +1300,7 @@ static int mtip_exec_internal_command(struct mtip_port *port,
if (readl(port->cmd_issue[MTIP_TAG_INTERNAL])
& (1 << MTIP_TAG_INTERNAL)) {
dev_err(&port->dd->pdev->dev,
- "Internal command did not complete [%d]\n",
- atomic);
+ "Internal command did not complete [atomic]\n");
rv = -EAGAIN;
if (test_bit(MTIP_DD_FLAG_REMOVE_PENDING_BIT,
&port->dd->dd_flag)) {
@@ -2758,7 +2768,9 @@ static int mtip_service_thread(void *data)
clear_bit(MTIP_FLAG_ISSUE_CMDS_BIT, &port->flags);
} else if (test_bit(MTIP_FLAG_REBUILD_BIT, &port->flags)) {
- mtip_ftl_rebuild_poll(dd);
+ if (!mtip_ftl_rebuild_poll(dd))
+ set_bit(MTIP_DD_FLAG_REBUILD_FAILED_BIT,
+ &dd->dd_flag);
clear_bit(MTIP_FLAG_REBUILD_BIT, &port->flags);
}
clear_bit(MTIP_FLAG_SVC_THD_ACTIVE_BIT, &port->flags);
@@ -3067,7 +3079,7 @@ static int mtip_hw_exit(struct driver_data *dd)
*/
if (!test_bit(MTIP_DD_FLAG_CLEANUP_BIT, &dd->dd_flag)) {
- if (test_bit(MTIP_FLAG_REBUILD_BIT, &dd->dd_flag))
+ if (!test_bit(MTIP_FLAG_REBUILD_BIT, &dd->port->flags))
if (mtip_standby_immediate(dd->port))
dev_warn(&dd->pdev->dev,
"STANDBY IMMEDIATE failed\n");
@@ -3657,6 +3669,11 @@ static int mtip_block_remove(struct driver_data *dd)
* from /dev
*/
del_gendisk(dd->disk);
+
+ spin_lock(&rssd_index_lock);
+ ida_remove(&rssd_index_ida, dd->index);
+ spin_unlock(&rssd_index_lock);
+
blk_cleanup_queue(dd->queue);
dd->disk = NULL;
dd->queue = NULL;
@@ -3686,6 +3703,11 @@ static int mtip_block_shutdown(struct driver_data *dd)
/* Delete our gendisk structure, and cleanup the blk queue. */
del_gendisk(dd->disk);
+
+ spin_lock(&rssd_index_lock);
+ ida_remove(&rssd_index_ida, dd->index);
+ spin_unlock(&rssd_index_lock);
+
blk_cleanup_queue(dd->queue);
dd->disk = NULL;
dd->queue = NULL;
--
1.7.1
--
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