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Subject[GIT PULL] SCSI fixes for 5.16-rc1
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Date
Six fixes, five in drivers (ufs, qla2xxx, iscsi) and one core change to
fix a regression in user space device state setting, which is used by
the iscsi daemons to effect device recovery.

The patch is available here:

git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi.git scsi-fixes

The short changelog is:

Adrian Hunter (2):
scsi: ufs: core: Fix another task management completion race
scsi: ufs: core: Fix task management completion timeout race

Bart Van Assche (1):
scsi: ufs: core: Improve SCSI abort handling

Ewan D. Milne (1):
scsi: qla2xxx: Fix mailbox direction flags in qla2xxx_get_adapter_id()

Mike Christie (2):
scsi: core: sysfs: Fix hang when device state is set via sysfs
scsi: iscsi: Unblock session then wake up error handler

And the diffstat:

drivers/scsi/qla2xxx/qla_mbx.c | 6 ++----
drivers/scsi/scsi_sysfs.c | 30 +++++++++++++++++++-----------
drivers/scsi/scsi_transport_iscsi.c | 6 +++---
drivers/scsi/ufs/ufshcd.c | 9 ++-------
4 files changed, 26 insertions(+), 25 deletions(-)

With full diff below.

James

---

diff --git a/drivers/scsi/qla2xxx/qla_mbx.c b/drivers/scsi/qla2xxx/qla_mbx.c
index 73a353153d33..10d2655ef676 100644
--- a/drivers/scsi/qla2xxx/qla_mbx.c
+++ b/drivers/scsi/qla2xxx/qla_mbx.c
@@ -1695,10 +1695,8 @@ qla2x00_get_adapter_id(scsi_qla_host_t *vha, uint16_t *id, uint8_t *al_pa,
mcp->in_mb |= MBX_13|MBX_12|MBX_11|MBX_10;
if (IS_FWI2_CAPABLE(vha->hw))
mcp->in_mb |= MBX_19|MBX_18|MBX_17|MBX_16;
- if (IS_QLA27XX(vha->hw) || IS_QLA28XX(vha->hw)) {
- mcp->in_mb |= MBX_15;
- mcp->out_mb |= MBX_7|MBX_21|MBX_22|MBX_23;
- }
+ if (IS_QLA27XX(vha->hw) || IS_QLA28XX(vha->hw))
+ mcp->in_mb |= MBX_15|MBX_21|MBX_22|MBX_23;

mcp->tov = MBX_TOV_SECONDS;
mcp->flags = 0;
diff --git a/drivers/scsi/scsi_sysfs.c b/drivers/scsi/scsi_sysfs.c
index 55addd78fde4..7afcec250f9b 100644
--- a/drivers/scsi/scsi_sysfs.c
+++ b/drivers/scsi/scsi_sysfs.c
@@ -792,6 +792,7 @@ store_state_field(struct device *dev, struct device_attribute *attr,
int i, ret;
struct scsi_device *sdev = to_scsi_device(dev);
enum scsi_device_state state = 0;
+ bool rescan_dev = false;

for (i = 0; i < ARRAY_SIZE(sdev_states); i++) {
const int len = strlen(sdev_states[i].name);
@@ -810,20 +811,27 @@ store_state_field(struct device *dev, struct device_attribute *attr,
}

mutex_lock(&sdev->state_mutex);
- ret = scsi_device_set_state(sdev, state);
- /*
- * If the device state changes to SDEV_RUNNING, we need to
- * run the queue to avoid I/O hang, and rescan the device
- * to revalidate it. Running the queue first is necessary
- * because another thread may be waiting inside
- * blk_mq_freeze_queue_wait() and because that call may be
- * waiting for pending I/O to finish.
- */
- if (ret == 0 && state == SDEV_RUNNING) {
+ if (sdev->sdev_state == SDEV_RUNNING && state == SDEV_RUNNING) {
+ ret = count;
+ } else {
+ ret = scsi_device_set_state(sdev, state);
+ if (ret == 0 && state == SDEV_RUNNING)
+ rescan_dev = true;
+ }
+ mutex_unlock(&sdev->state_mutex);
+
+ if (rescan_dev) {
+ /*
+ * If the device state changes to SDEV_RUNNING, we need to
+ * run the queue to avoid I/O hang, and rescan the device
+ * to revalidate it. Running the queue first is necessary
+ * because another thread may be waiting inside
+ * blk_mq_freeze_queue_wait() and because that call may be
+ * waiting for pending I/O to finish.
+ */
blk_mq_run_hw_queues(sdev->request_queue, true);
scsi_rescan_device(dev);
}
- mutex_unlock(&sdev->state_mutex);

return ret == 0 ? count : -EINVAL;
}
diff --git a/drivers/scsi/scsi_transport_iscsi.c b/drivers/scsi/scsi_transport_iscsi.c
index 78343d3f9385..554b6f784223 100644
--- a/drivers/scsi/scsi_transport_iscsi.c
+++ b/drivers/scsi/scsi_transport_iscsi.c
@@ -1899,12 +1899,12 @@ static void session_recovery_timedout(struct work_struct *work)
}
spin_unlock_irqrestore(&session->lock, flags);

- if (session->transport->session_recovery_timedout)
- session->transport->session_recovery_timedout(session);
-
ISCSI_DBG_TRANS_SESSION(session, "Unblocking SCSI target\n");
scsi_target_unblock(&session->dev, SDEV_TRANSPORT_OFFLINE);
ISCSI_DBG_TRANS_SESSION(session, "Completed unblocking SCSI target\n");
+
+ if (session->transport->session_recovery_timedout)
+ session->transport->session_recovery_timedout(session);
}

static void __iscsi_unblock_session(struct work_struct *work)
diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index afd38142b1c0..13c09dbd99b9 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -6453,9 +6453,8 @@ static irqreturn_t ufshcd_tmc_handler(struct ufs_hba *hba)
irqreturn_t ret = IRQ_NONE;
int tag;

- pending = ufshcd_readl(hba, REG_UTP_TASK_REQ_DOOR_BELL);
-
spin_lock_irqsave(hba->host->host_lock, flags);
+ pending = ufshcd_readl(hba, REG_UTP_TASK_REQ_DOOR_BELL);
issued = hba->outstanding_tasks & ~pending;
for_each_set_bit(tag, &issued, hba->nutmrs) {
struct request *req = hba->tmf_rqs[tag];
@@ -6616,11 +6615,6 @@ static int __ufshcd_issue_tm_cmd(struct ufs_hba *hba,
err = wait_for_completion_io_timeout(&wait,
msecs_to_jiffies(TM_CMD_TIMEOUT));
if (!err) {
- /*
- * Make sure that ufshcd_compl_tm() does not trigger a
- * use-after-free.
- */
- req->end_io_data = NULL;
ufshcd_add_tm_upiu_trace(hba, task_tag, UFS_TM_ERR);
dev_err(hba->dev, "%s: task management cmd 0x%.2x timed-out\n",
__func__, tm_function);
@@ -7116,6 +7110,7 @@ static int ufshcd_abort(struct scsi_cmnd *cmd)
goto release;
}

+ lrbp->cmd = NULL;
err = SUCCESS;

release:
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