This is a note to let you know that I've just added the patch titled
fsi/sbefifo: Fix reset timeout
to the 5.13-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
fsi-sbefifo-fix-reset-timeout.patch
and it can be found in the queue-5.13 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 6640da0170a1db4d4599b6dcd1eef570ea288628
Author: Joachim Fenkes <FENKES@xxxxxxxxxx>
Date: Fri Jul 24 16:45:18 2020 +0930
fsi/sbefifo: Fix reset timeout
[ Upstream commit 9ab1428dfe2c66b51e0b41337cd0164da0ab6080 ]
On BMCs with lower timer resolution than 1ms, msleep(1) will take
way longer than 1ms, so looping 10k times won't wait for 10s but
significantly longer.
Fix this by using jiffies like the rest of the code.
Fixes: 9f4a8a2d7f9d ("fsi/sbefifo: Add driver for the SBE FIFO")
Signed-off-by: Joachim Fenkes <fenkes@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20200724071518.430515-3-joel@xxxxxxxxx
Signed-off-by: Joel Stanley <joel@xxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/fsi/fsi-sbefifo.c b/drivers/fsi/fsi-sbefifo.c
index de27c435d706..84cb965bfed5 100644
--- a/drivers/fsi/fsi-sbefifo.c
+++ b/drivers/fsi/fsi-sbefifo.c
@@ -325,7 +325,8 @@ static int sbefifo_up_write(struct sbefifo *sbefifo, __be32 word)
static int sbefifo_request_reset(struct sbefifo *sbefifo)
{
struct device *dev = &sbefifo->fsi_dev->dev;
- u32 status, timeout;
+ unsigned long end_time;
+ u32 status;
int rc;
dev_dbg(dev, "Requesting FIFO reset\n");
@@ -341,7 +342,8 @@ static int sbefifo_request_reset(struct sbefifo *sbefifo)
}
/* Wait for it to complete */
- for (timeout = 0; timeout < SBEFIFO_RESET_TIMEOUT; timeout++) {
+ end_time = jiffies + msecs_to_jiffies(SBEFIFO_RESET_TIMEOUT);
+ while (!time_after(jiffies, end_time)) {
rc = sbefifo_regr(sbefifo, SBEFIFO_UP | SBEFIFO_STS, &status);
if (rc) {
dev_err(dev, "Failed to read UP fifo status during reset"
@@ -355,7 +357,7 @@ static int sbefifo_request_reset(struct sbefifo *sbefifo)
return 0;
}
- msleep(1);
+ cond_resched();
}
dev_err(dev, "FIFO reset timed out\n");
