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SCSI fixes on 20201113

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Three small fixes, all in the embedded ufs driver subsystem.
 
 Signed-off-by: James E.J. Bottomley <jejb@linux.ibm.com>
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Merge tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi

Pull SCSI fixes from James Bottomley:
 "Three small fixes, all in the embedded ufs driver subsystem"

* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
  scsi: ufshcd: Fix missing destroy_workqueue()
  scsi: ufs: Try to save power mode change and UIC cmd completion timeout
  scsi: ufs: Fix unbalanced scsi_block_reqs_cnt caused by ufshcd_hold()
This commit is contained in:
Linus Torvalds 2020-11-14 12:19:21 -08:00
commit 0c0451112b
2 changed files with 31 additions and 5 deletions
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34
drivers/scsi/ufs/ufshcd.c
View File

@ -1627,12 +1627,12 @@ start:
*/
fallthrough;
case CLKS_OFF:
ufshcd_scsi_block_requests(hba);
hba->clk_gating.state = REQ_CLKS_ON;
trace_ufshcd_clk_gating(dev_name(hba->dev),
hba->clk_gating.state);
queue_work(hba->clk_gating.clk_gating_workq,
&hba->clk_gating.ungate_work);
if (queue_work(hba->clk_gating.clk_gating_workq,
&hba->clk_gating.ungate_work))
ufshcd_scsi_block_requests(hba);
/*
* fall through to check if we should wait for this
* work to be done or not.
@ -2115,10 +2115,20 @@ ufshcd_wait_for_uic_cmd(struct ufs_hba *hba, struct uic_command *uic_cmd)
unsigned long flags;
if (wait_for_completion_timeout(&uic_cmd->done,
msecs_to_jiffies(UIC_CMD_TIMEOUT)))
msecs_to_jiffies(UIC_CMD_TIMEOUT))) {
ret = uic_cmd->argument2 & MASK_UIC_COMMAND_RESULT;
else
} else {
ret = -ETIMEDOUT;
dev_err(hba->dev,
"uic cmd 0x%x with arg3 0x%x completion timeout\n",
uic_cmd->command, uic_cmd->argument3);
if (!uic_cmd->cmd_active) {
dev_err(hba->dev, "%s: UIC cmd has been completed, return the result\n",
__func__);
ret = uic_cmd->argument2 & MASK_UIC_COMMAND_RESULT;
}
}
spin_lock_irqsave(hba->host->host_lock, flags);
hba->active_uic_cmd = NULL;
@ -2150,6 +2160,7 @@ __ufshcd_send_uic_cmd(struct ufs_hba *hba, struct uic_command *uic_cmd,
if (completion)
init_completion(&uic_cmd->done);
uic_cmd->cmd_active = 1;
ufshcd_dispatch_uic_cmd(hba, uic_cmd);
return 0;
@ -3807,10 +3818,18 @@ static int ufshcd_uic_pwr_ctrl(struct ufs_hba *hba, struct uic_command *cmd)
dev_err(hba->dev,
"pwr ctrl cmd 0x%x with mode 0x%x completion timeout\n",
cmd->command, cmd->argument3);
if (!cmd->cmd_active) {
dev_err(hba->dev, "%s: Power Mode Change operation has been completed, go check UPMCRS\n",
__func__);
goto check_upmcrs;
}
ret = -ETIMEDOUT;
goto out;
}
check_upmcrs:
status = ufshcd_get_upmcrs(hba);
if (status != PWR_LOCAL) {
dev_err(hba->dev,
@ -4902,11 +4921,14 @@ static irqreturn_t ufshcd_uic_cmd_compl(struct ufs_hba *hba, u32 intr_status)
ufshcd_get_uic_cmd_result(hba);
hba->active_uic_cmd->argument3 =
ufshcd_get_dme_attr_val(hba);
if (!hba->uic_async_done)
hba->active_uic_cmd->cmd_active = 0;
complete(&hba->active_uic_cmd->done);
retval = IRQ_HANDLED;
}
if ((intr_status & UFSHCD_UIC_PWR_MASK) && hba->uic_async_done) {
hba->active_uic_cmd->cmd_active = 0;
complete(hba->uic_async_done);
retval = IRQ_HANDLED;
}
@ -8906,6 +8928,7 @@ void ufshcd_remove(struct ufs_hba *hba)
blk_mq_free_tag_set(&hba->tmf_tag_set);
blk_cleanup_queue(hba->cmd_queue);
scsi_remove_host(hba->host);
destroy_workqueue(hba->eh_wq);
/* disable interrupts */
ufshcd_disable_intr(hba, hba->intr_mask);
ufshcd_hba_stop(hba);
@ -9206,6 +9229,7 @@ out_remove_scsi_host:
exit_gating:
ufshcd_exit_clk_scaling(hba);
ufshcd_exit_clk_gating(hba);
destroy_workqueue(hba->eh_wq);
out_disable:
hba->is_irq_enabled = false;
ufshcd_hba_exit(hba);

2
drivers/scsi/ufs/ufshcd.h
View File

@ -64,6 +64,7 @@ enum dev_cmd_type {
* @argument1: UIC command argument 1
* @argument2: UIC command argument 2
* @argument3: UIC command argument 3
* @cmd_active: Indicate if UIC command is outstanding
* @done: UIC command completion
*/
struct uic_command {
@ -71,6 +72,7 @@ struct uic_command {
u32 argument1;
u32 argument2;
u32 argument3;
int cmd_active;
struct completion done;
};