net-sysfs: Use rtnl_trylock in sysfs methods.

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The earlier patch to fix the deadlock between a network device going
away and writing to sysfs attributes was incomplete.
- It did not set signal_pending so we would leak ERSTARTSYS to user space.
- It used ERESTARTSYS which only restarts if sigaction configures it to.
- It did not cover store and show for ifalias.

So fix all of these up and use the new helper restart_syscall so we get
the details correct on what it takes.

Signed-off-by: Eric W. Biederman <ebiederm@aristanetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Eric W. Biederman 2009-05-13 16:57:25 +00:00 • committed by David S. Miller

parent 690cc3ffe3

commit 336ca57c3b

1 changed files with 5 additions and 3 deletions

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net/core/net-sysfs.c

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