tree 9e6db491a675b7ab30a83c8415ed847e208fdfce
parent e71ba9452f0b5b2e8dc8aa5445198cd9214a6a62
author Chunyan Zhang <chunyan.zhang@unisoc.com> 1607921930 +0800
committer Wolfram Sang <wsa@kernel.org> 1609784527 +0100

i2c: sprd: use a specific timeout to avoid system hang up issue

If the i2c device SCL bus being pulled up due to some exception before
message transfer done, the system cannot receive the completing interrupt
signal any more, it would not exit waiting loop until MAX_SCHEDULE_TIMEOUT
jiffies eclipse, that would make the system seemed hang up. To avoid that
happen, this patch adds a specific timeout for message transfer.

Fixes: 8b9ec0719834 ("i2c: Add Spreadtrum I2C controller driver")
Signed-off-by: Linhua Xu <linhua.xu@unisoc.com>
Signed-off-by: Chunyan Zhang <chunyan.zhang@unisoc.com>
[wsa: changed errno to ETIMEDOUT]
Signed-off-by: Wolfram Sang <wsa@kernel.org>