mirrors
/
linux-stable
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
1
0
Fork 0
Code Issues Releases Wiki Activity

Input: applespi - fix occasional crc errors under load. 

For some reason, when the system is under heavy CPU load, the read
following the write sometimes occurs unusually quickly, resulting in
the read data not being quite ready and hence a bad packet getting read.
Adding another delay after reading the status message appears to fix
this.

Signed-off-by: Ronald Tschalär <ronald@innovation.ch>
Link: https://lore.kernel.org/r/20210217190718.11035-2-ronald@innovation.ch
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This commit is contained in:
Ronald Tschalär 2021-02-19 11:12:00 -08:00 committed by Dmitry Torokhov
parent 0ce1ac2314
commit e64123949e
1 changed files with 2 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/input/keyboard/applespi.c
View File

@ -749,6 +749,8 @@ static void applespi_async_write_complete(void *context)
applespi->tx_status,
APPLESPI_STATUS_SIZE);
udelay(SPI_RW_CHG_DELAY_US);
if (!applespi_check_write_status(applespi, applespi->wr_m.status)) {
/*
* If we got an error, we presumably won't get the expected