diff options
| author | Jeff Dike <jdike@addtoit.com> | 2007-11-14 17:00:23 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-11-14 18:45:43 -0800 |
| commit | 9ac625a3986034d79938baf9604210280fae35fa (patch) | |
| tree | 66c45bdd302027e77dec5df93ffa2e81543d6ca2 /arch/um/kernel | |
| parent | 7c06a8dc64a2d1884bd19b4c6353d9267ae4e3e1 (diff) | |
| download | blackbird-op-linux-9ac625a3986034d79938baf9604210280fae35fa.tar.gz blackbird-op-linux-9ac625a3986034d79938baf9604210280fae35fa.zip | |
uml: fix spurious IRQ testing
The spurious IRQ testing in request_irq is mishandled in um_request_irq, which
sets the incoming file descriptors non-blocking only after request_irq
succeeds. This results in the spurious irq calling read on a blocking
descriptor, and a hang.
Fixed by reversing the O_NONBLOCK setting and the request_irq call.
Signed-off-by: Jeff Dike <jdike@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/um/kernel')
| -rw-r--r-- | arch/um/kernel/irq.c | 13 |
1 files changed, 7 insertions, 6 deletions
diff --git a/arch/um/kernel/irq.c b/arch/um/kernel/irq.c index 70c2d625b070..ba11ccd6a8a3 100644 --- a/arch/um/kernel/irq.c +++ b/arch/um/kernel/irq.c @@ -347,14 +347,15 @@ int um_request_irq(unsigned int irq, int fd, int type, { int err; - err = request_irq(irq, handler, irqflags, devname, dev_id); - if (err) - return err; - - if (fd != -1) + if (fd != -1) { err = activate_fd(irq, fd, type, dev_id); - return err; + if (err) + return err; + } + + return request_irq(irq, handler, irqflags, devname, dev_id); } + EXPORT_SYMBOL(um_request_irq); EXPORT_SYMBOL(reactivate_fd); |
