diff options
author | David Daney <david.daney@cavium.com> | 2012-04-06 03:52:13 +0400 |
---|---|---|
committer | Grant Likely <grant.likely@secretlab.ca> | 2012-04-11 08:39:16 +0400 |
commit | 5b7526e3a640e491075557acaa842c59c652c0c3 (patch) | |
tree | 43b3d5d33078b4683482b25559735e1e5d719a72 /include | |
parent | 0034102808e0dbbf3a2394b82b1bb40b5778de9e (diff) | |
download | linux-5b7526e3a640e491075557acaa842c59c652c0c3.tar.xz |
irq/irq_domain: Quit ignoring error returns from irq_alloc_desc_from().
In commit 4bbdd45a (irq_domain/powerpc: eliminate irq_map; use
irq_alloc_desc() instead) code was added that ignores error returns
from irq_alloc_desc_from() by (silently) casting the return value to
unsigned. The negitive value error return now suddenly looks like a
valid irq number.
Commits cc79ca69 (irq_domain: Move irq_domain code from powerpc to
kernel/irq) and 1bc04f2c (irq_domain: Add support for base irq and
hwirq in legacy mappings) move this code to its current location in
irqdomain.c
The result of all of this is a null pointer dereference OOPS if one of
the error cases is hit.
The fix: Don't cast away the negativeness of the return value and then
check for errors.
Signed-off-by: David Daney <david.daney@cavium.com>
Acked-by: Rob Herring <rob.herring@calxeda.com>
[grant.likely: dropped addition of new 'irq' variable]
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Diffstat (limited to 'include')
0 files changed, 0 insertions, 0 deletions