b43legacy: Release mutex in error handling code
The mutex is released on a successful return, so it would seem that it should be released on an error return as well. The semantic patch finds this problem is as follows: (http://www.emn.fr/x-info/coccinelle/) // <smpl> @@ expression l; @@ mutex_lock(l); ... when != mutex_unlock(l) when any when strict ( if (...) { ... when != mutex_unlock(l) + mutex_unlock(l); return ...; } | mutex_unlock(l); ) // </smpl> Signed-off-by: NJulia Lawall <julia@diku.dk> Signed-off-by: NMichael Buesch <mb@bu3sch.de> Cc: stable <stable@kernel.org> Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>
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