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| author | Martin Fuzzey <martin.fuzzey@flowbird.group> | 2020-09-30 11:36:46 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-11-05 13:06:59 +0300 |
| commit | caeca56c8296ff115f4080d42c1a4ec32929e624 (patch) | |
| tree | ad378de626bfbab87776d7da91755347a7cdcafc /drivers/w1/w1.c | |
| parent | 3e1f2d012c506cb3c8f6291d51df0757bb2c507a (diff) | |
| download | linux-caeca56c8296ff115f4080d42c1a4ec32929e624.tar.xz | |
w1: mxc_w1: Fix timeout resolution problem leading to bus error
commit c9723750a699c3bd465493ac2be8992b72ccb105 upstream.
On my platform (i.MX53) bus access sometimes fails with
w1_search: max_slave_count 64 reached, will continue next search.
The reason is the use of jiffies to implement a 200us timeout in
mxc_w1_ds2_touch_bit().
On some platforms the jiffies timer resolution is insufficient for this.
Fix by replacing jiffies by ktime_get().
For consistency apply the same change to the other use of jiffies in
mxc_w1_ds2_reset_bus().
Fixes: f80b2581a706 ("w1: mxc_w1: Optimize mxc_w1_ds2_touch_bit()")
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Martin Fuzzey <martin.fuzzey@flowbird.group>
Link: https://lore.kernel.org/r/1601455030-6607-1-git-send-email-martin.fuzzey@flowbird.group
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/w1/w1.c')
0 files changed, 0 insertions, 0 deletions