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| author | Adrian Hunter <adrian.hunter@intel.com> | 2020-08-11 16:39:36 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-09-03 11:24:25 +0200 |
| commit | 31871fb7adca15a0c60e723bad673802ce647932 (patch) | |
| tree | 9231950d3cf19f10d922290b9406b872d768ed04 /drivers/scsi/ufs | |
| parent | 8f76a208c2f439c02fc5e25fef0790938662e723 (diff) | |
| download | linux-stable-31871fb7adca15a0c60e723bad673802ce647932.tar.gz linux-stable-31871fb7adca15a0c60e723bad673802ce647932.tar.bz2 linux-stable-31871fb7adca15a0c60e723bad673802ce647932.zip | |
scsi: ufs: Improve interrupt handling for shared interrupts
[ Upstream commit 127d5f7c4b653b8be5eb3b2c7bbe13728f9003ff ]
For shared interrupts, the interrupt status might be zero, so check that
first.
Link: https://lore.kernel.org/r/20200811133936.19171-2-adrian.hunter@intel.com
Reviewed-by: Avri Altman <avri.altman@wdc.com>
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/scsi/ufs')
| -rw-r--r-- | drivers/scsi/ufs/ufshcd.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c index 747a2321b5f7..d8c6fd201275 100644 --- a/drivers/scsi/ufs/ufshcd.c +++ b/drivers/scsi/ufs/ufshcd.c @@ -5605,7 +5605,7 @@ static void ufshcd_sl_intr(struct ufs_hba *hba, u32 intr_status) */ static irqreturn_t ufshcd_intr(int irq, void *__hba) { - u32 intr_status, enabled_intr_status; + u32 intr_status, enabled_intr_status = 0; irqreturn_t retval = IRQ_NONE; struct ufs_hba *hba = __hba; int retries = hba->nutrs; @@ -5619,7 +5619,7 @@ static irqreturn_t ufshcd_intr(int irq, void *__hba) * read, make sure we handle them by checking the interrupt status * again in a loop until we process all of the reqs before returning. */ - do { + while (intr_status && retries--) { enabled_intr_status = intr_status & ufshcd_readl(hba, REG_INTERRUPT_ENABLE); if (intr_status) @@ -5630,7 +5630,7 @@ static irqreturn_t ufshcd_intr(int irq, void *__hba) } intr_status = ufshcd_readl(hba, REG_INTERRUPT_STATUS); - } while (intr_status && --retries); + } spin_unlock(hba->host->host_lock); return retval; |