diff options
| author | Bart Van Assche <bvanassche@acm.org> | 2021-05-19 23:20:57 +0300 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2021-06-01 05:48:20 +0300 |
| commit | 40d2fd05ecc2b63d1bd8f6686f09941afe85edfe (patch) | |
| tree | 54afa469524b8f2f999d98d0971a69c2447615f3 | |
| parent | a0815c45c89f544861eae55d85ccee6b1b1451e8 (diff) | |
| download | linux-40d2fd05ecc2b63d1bd8f6686f09941afe85edfe.tar.xz | |
scsi: ufs: Suppress false positive unhandled interrupt messages
From ufshcd_transfer_req_compl():
Resetting interrupt aggregation counters first and reading the
DOOR_BELL afterward allows us to handle all the completed requests. In
order to prevent other interrupts starvation the DB is read once after
reset. The down side of this solution is the possibility of false
interrupt if device completes another request after resetting
aggregation and before reading the DB.
Prevent that ufshcd_intr() reports a false positive "Unhandled interrupt"
message if the above scenario is triggered.
Link: https://lore.kernel.org/r/20210519202058.12634-2-bvanassche@acm.org
Cc: Stanley Chu <stanley.chu@mediatek.com>
Cc: Can Guo <cang@codeaurora.org>
Cc: Bean Huo <beanhuo@micron.com>
Cc: Jaegeuk Kim <jaegeuk@kernel.org>
Cc: Asutosh Das <asutoshd@codeaurora.org>
Suggested-by: Jaegeuk Kim <jaegeuk@kernel.org>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
| -rw-r--r-- | drivers/scsi/ufs/ufshcd.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c index c382260e0cf7..af527e77fe66 100644 --- a/drivers/scsi/ufs/ufshcd.c +++ b/drivers/scsi/ufs/ufshcd.c @@ -6453,7 +6453,8 @@ static irqreturn_t ufshcd_intr(int irq, void *__hba) } if (enabled_intr_status && retval == IRQ_NONE && - !ufshcd_eh_in_progress(hba)) { + (!(enabled_intr_status & UTP_TRANSFER_REQ_COMPL) || + hba->outstanding_reqs) && !ufshcd_eh_in_progress(hba)) { dev_err(hba->dev, "%s: Unhandled interrupt 0x%08x (0x%08x, 0x%08x)\n", __func__, intr_status, |