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| author | Ioana Radulescu <ruxandra.radulescu@nxp.com> | 2017-09-28 09:10:33 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-10-03 18:34:56 +0200 |
| commit | 8dabf52ffb6445fa5bcc8b6d2ecb615f60d0dd12 (patch) | |
| tree | 41177623a4daa6077ab20bfdbc1c9725002a4228 /drivers/staging/fsl-mc/bus | |
| parent | abd4b78793d12691380f95bf620d47f20259b44d (diff) | |
| download | op-kernel-dev-8dabf52ffb6445fa5bcc8b6d2ecb615f60d0dd12.zip op-kernel-dev-8dabf52ffb6445fa5bcc8b6d2ecb615f60d0dd12.tar.gz | |
staging: fsl-mc/dpio: Fix incorrect comparison
For some dpio functions, a cpu id parameter value of -1 is
valid and means "any". But when trying to validate this param
value against an upper limit, in this case num_possible_cpus(),
we risk obtaining the wrong result due to an implicit cast.
Avoid an incorrect check result by explicitly comparing the
cpu id with the "any" value before verifying the upper bound.
Signed-off-by: Ioana Radulescu <ruxandra.radulescu@nxp.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/staging/fsl-mc/bus')
| -rw-r--r-- | drivers/staging/fsl-mc/bus/dpio/dpio-service.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/staging/fsl-mc/bus/dpio/dpio-service.c b/drivers/staging/fsl-mc/bus/dpio/dpio-service.c index f809682..a609ec8 100644 --- a/drivers/staging/fsl-mc/bus/dpio/dpio-service.c +++ b/drivers/staging/fsl-mc/bus/dpio/dpio-service.c @@ -76,7 +76,7 @@ static inline struct dpaa2_io *service_select_by_cpu(struct dpaa2_io *d, if (d) return d; - if (unlikely(cpu >= num_possible_cpus())) + if (cpu != DPAA2_IO_ANY_CPU && cpu >= num_possible_cpus()) return NULL; /* @@ -121,7 +121,7 @@ struct dpaa2_io *dpaa2_io_create(const struct dpaa2_io_desc *desc) return NULL; /* check if CPU is out of range (-1 means any cpu) */ - if (desc->cpu >= num_possible_cpus()) { + if (desc->cpu != DPAA2_IO_ANY_CPU && desc->cpu >= num_possible_cpus()) { kfree(obj); return NULL; } |
