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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>
This commit is contained in:
Sebastian Ott 2017-10-26 16:47:25 +02:00 committed by Martin Schwidefsky
parent 648a6f4495
commit 30e8eb8671
1 changed files with 2 additions and 4 deletions
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6
drivers/s390/cio/qdio_thinint.c
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@ -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)