| commit | cd8c0bb2bd57c48c451ebea86065257ef2500b00 | [log] [tgz] |
|---|---|---|
| author | Jia-Ju Bai <baijiaju1990@gmail.com> | Wed Dec 13 21:55:50 2017 +0800 |
| committer | Alexandre Belloni <alexandre.belloni@free-electrons.com> | Fri Jan 12 00:20:28 2018 +0100 |
| tree | 4eb179a50caab10d3ababa0a7f3b6358ae74a8f7 | |
| parent | 2da6877f0e2ced7825a31556ada6b2ac2e50877f [diff] |
rtc: r7301: Fix a possible sleep-in-atomic bug in rtc7301_read_time
The driver may sleep under a spinlock.
The function call path is:
rtc7301_read_time (acquire the spinlock)
rtc7301_wait_while_busy
usleep_range --> may sleep
To fix it, usleep_range is replaced with udelay.
This bug is found by my static analysis tool(DSAC) and checked by my code review.
Signed-off-by: Jia-Ju Bai <baijiaju1990@gmail.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>