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| author |   Sebastian Ott <sebott@linux.vnet.ibm.com> | 2017-10-26 16:47:25 +0200 |
|---|---|---|
| committer |   Martin Schwidefsky <schwidefsky@de.ibm.com> | 2017-11-03 08:00:33 +0100 |
| commit | 30e8eb867122183076b7994f9b83920f9ec5451b (patch) | |
| tree | ba3df25bb0a248d9ea9342f6e32737cb2ff61564 /drivers/s390 | |
| parent | s390/qdio: use atomic_cmpxchg (diff) | |
| download | linux-dev-30e8eb867122183076b7994f9b83920f9ec5451b.tar.xz linux-dev-30e8eb867122183076b7994f9b83920f9ec5451b.zip | |
s390/qdio: sanitize put_indicator
qdio maintains an array of struct indicator_t. put_indicator takes a pointer
to a member of a struct indicator_t within that array, calculates the index,
and uses the array and the index to get the struct indicator_t.
Simply use the pointer directly.
Although the pointer happens to point to the first member of that struct
use the container_of macro.
Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Acked-by: Ursula Braun <ubraun@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'drivers/s390')
| -rw-r--r-- | drivers/s390/cio/qdio_thinint.c | 6 |
1 files changed, 2 insertions, 4 deletions
diff --git a/drivers/s390/cio/qdio_thinint.c b/drivers/s390/cio/qdio_thinint.c index 3e587bf426b0..f99d1c36168d 100644 --- a/drivers/s390/cio/qdio_thinint.c +++ b/drivers/s390/cio/qdio_thinint.c @@ -66,13 +66,11 @@ static u32 *get_indicator(void) static void put_indicator(u32 *addr) { - int i; + struct indicator_t *ind = container_of(addr, struct indicator_t, ind); if (!addr) return; - i = ((unsigned long)addr - (unsigned long)q_indicators) / - sizeof(struct indicator_t); - atomic_dec(&q_indicators[i].count); + atomic_dec(&ind->count); } void tiqdio_add_input_queues(struct qdio_irq *irq_ptr) |