linux-stable/drivers/w1/masters
Martin Fuzzey 3fc2cbba40 w1: mxc_w1: Fix timeout resolution problem leading to bus error
commit c9723750a6 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: f80b2581a7 ("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>
2020-11-05 11:43:25 +01:00
..
ds1wm.c
ds2482.c
ds2490.c
Kconfig
Makefile
matrox_w1.c
mxc_w1.c w1: mxc_w1: Fix timeout resolution problem leading to bus error 2020-11-05 11:43:25 +01:00
omap_hdq.c w1: omap-hdq: cleanup to add missing newline for some dev_dbg 2020-06-22 09:31:26 +02:00
sgi_w1.c
w1-gpio.c