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authorBartlomiej Zolnierkiewicz <bzolnier@gmail.com>2009-07-26 10:21:01 -0400
committerJeff Garzik <jgarzik@redhat.com>2009-07-28 21:05:41 -0400
commit705d201414382b0966d7c903d738dfdb9380e4af (patch)
tree8b5b6c19e6ea3837e4775cd3b00aa17c4442a1d4 /drivers/ata
parent044dcc824a167e3d39ba69a49e2b723dd10678f6 (diff)
libata: add missing NULL pointer check to ata_eh_reset()
drivers/ata/libata-eh.c +2403 ata_eh_reset(80) warning: variable derefenced before check 'slave' Please note that this is _not_ a real bug at the moment since ata_eh_context structure is embedded into ata_list structure and the code alwas checks for 'slave' before accessing 'sehc'. Anyway lets add missing check and always have a valid 'sehc' pointer (which makes code easier to understand and prevents introducing some possible bugs in the future). Reported-by: Dan Carpenter <error27@gmail.com> Cc: corbet@lwn.net Cc: eteo@redhat.com Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Diffstat (limited to 'drivers/ata')
-rw-r--r--drivers/ata/libata-eh.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c
index 1a07c061f644..79711b64054b 100644
--- a/drivers/ata/libata-eh.c
+++ b/drivers/ata/libata-eh.c
@@ -2327,7 +2327,7 @@ int ata_eh_reset(struct ata_link *link, int classify,
2327 struct ata_port *ap = link->ap; 2327 struct ata_port *ap = link->ap;
2328 struct ata_link *slave = ap->slave_link; 2328 struct ata_link *slave = ap->slave_link;
2329 struct ata_eh_context *ehc = &link->eh_context; 2329 struct ata_eh_context *ehc = &link->eh_context;
2330 struct ata_eh_context *sehc = &slave->eh_context; 2330 struct ata_eh_context *sehc = slave ? &slave->eh_context : NULL;
2331 unsigned int *classes = ehc->classes; 2331 unsigned int *classes = ehc->classes;
2332 unsigned int lflags = link->flags; 2332 unsigned int lflags = link->flags;
2333 int verbose = !(ehc->i.flags & ATA_EHI_QUIET); 2333 int verbose = !(ehc->i.flags & ATA_EHI_QUIET);