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NET: am79c961: fix race in link status code
authorRussell King <rmk+kernel@arm.linux.org.uk>
Mon, 5 Sep 2011 07:58:29 +0000 (08:58 +0100)
committerRussell King <rmk+kernel@arm.linux.org.uk>
Mon, 5 Sep 2011 07:58:29 +0000 (08:58 +0100)
commit1df726ef0a700587a712a3660b2caa8e533c7de9
tree02086e08de0cb385a332833bdc14b7c12c92b50atree | snapshot (tar.gz zip)
parentfb492c9160f3d40d09456a79cc669fba74d7d9cccommit | diff
NET: am79c961: fix race in link status code

The link status code operates from a timer, and writes the index
register without first taking a lock.  A well-placed interrupt
between writing the index register and reading the data register
could change the index register on us, which will return wrong data.
Add the necessary lock.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
drivers/net/arm/am79c961a.c diff | blob | blame | history