lkml.org 
[lkml]   [2021]   [Jul]   [12]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    From
    Subject[PATCH 5.10 493/593] fsi/sbefifo: Fix reset timeout
    Date
    From: Joachim Fenkes <FENKES@de.ibm.com>

    [ 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@de.ibm.com>
    Link: https://lore.kernel.org/r/20200724071518.430515-3-joel@jms.id.au
    Signed-off-by: Joel Stanley <joel@jms.id.au>
    Signed-off-by: Sasha Levin <sashal@kernel.org>
    ---
    drivers/fsi/fsi-sbefifo.c | 8 +++++---
    1 file changed, 5 insertions(+), 3 deletions(-)

    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");

    --
    2.30.2


    \
     
     \ /
      Last update: 2021-07-12 09:15    [W:2.510 / U:2.224 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site