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authorSergei Shtylylov <sshtylyov@ru.mvista.com>2005-12-15 20:34:30 (GMT)
committerLinus Torvalds <torvalds@g5.osdl.org>2005-12-15 22:22:45 (GMT)
commit7b6666530e2736f190a2629c8abe34275054449f (patch)
tree677a4dc1ba95a98c6c6a98949fdcb0bca95ba1cf /fs/nfs/pagelist.c
parent2f40fb72a2121da44c35f2588ee9abce1dffa2a9 (diff)
downloadlinux-fsl-qoriq-7b6666530e2736f190a2629c8abe34275054449f.tar.xz
[PATCH] Au1550 AC'97 OSS driver spinlock fixes
We have found some issues with Au1550 AC'97 OSS driver in 2.6 (sound/oss/au1550_ac97.c), though it also should concern 2.4 driver (drivers/sound/au1550_psc.c). start_dac() grabs a spinlock already held by its caller, au1550_write(). This doesn't show up with the standard UP spinlock impelmentation but when the different one (mutex based) is in use, a lockup happens. And the interrupt handlers also didn't grab the spinlock -- that's OK in the usual kernel but not when the IRQ handlers are threaded. So, they're grabbing the spinlock now (as every correct interrupt handler should do). Signed-off-by: Konstantin Baidarov <kbaidarov@ru.mvista.com> Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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