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authorMichael Buesch <mb@bu3sch.de>2007-02-12 00:53:26 -0800
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-02-12 09:48:35 -0800
commit053b47ff249b9e0a634dae807f81465205e7c228 (patch)
tree220695a694f2be08c26a836435e4ba9f093b9af8 /drivers/zorro/zorro.h
parenta871fe858c5437ff8798fbaef52b6a88110b64a1 (diff)
[PATCH] Workaround CAPI subsystem locking issue
I think the following patch should go into the kernel, until the ISDN/CAPI guys create the real fix for this issue. The issue is a concurrency issue with some internal CAPI data structure which can crash the kernel. On my FritzCard DSL with the AVM driver it crashes about once a day without this workaround patch. With this workaround patch it's rock-stable (at least on UP, but I don't see why this shouldn't work on SMP as well. But maybe I'm missing something.) This workaround is kind of a sledgehammer which inserts a global lock to wrap around all the critical sections. Of course, this is a scalability issue, if you have many ISDN/CAPI cards. But it prevents a crash. So I vote for this fix to get merged, until people come up with a better solution. Better have a stable kernel that's less scalable, than a crashing and useless kernel. This bug is in the kernel since 2.6.15 (at least). Signed-off-by: Michael Buesch <mb@bu3sch.de> Cc: Kai Germaschewski <kai.germaschewski@gmx.de> Cc: Karsten Keil <kkeil@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/zorro/zorro.h')
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