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IB/mlx5: Fix the size parameter to find_first_bit 

The 2nd parameter of 'find_first_bit' is the number of bits to search.
In this case, we are passing 'sizeof(tmp)' which is likely to be 4 or 8
because 'tmp' is an 'unsigned long'.

It is likely that the number of bits of 'tmp' was expected here. So use
BITS_PER_LONG instead.

It has been spotted by the following coccinelle script:
@@
expression ret, x;

@@
*  ret = \(find_first_bit \| find_first_zero_bit\) (x, sizeof(...));

Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Acked-by: Majd Dibbiny <majd@mellanox.com>
Acked-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Christophe Jaillet 2016-08-26 07:16:17 +02:00 committed by Doug Ledford
parent 61a28d2b69
commit fffd68734d
1 changed files with 3 additions and 3 deletions
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6
drivers/infiniband/hw/mlx5/mem.c
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@ -71,7 +71,7 @@ void mlx5_ib_cont_pages(struct ib_umem *umem, u64 addr, int *count, int *shift,
addr = addr >> page_shift;
tmp = (unsigned long)addr;
m = find_first_bit(&tmp, sizeof(tmp));
m = find_first_bit(&tmp, BITS_PER_LONG);
skip = 1 << m;
mask = skip - 1;
i = 0;
@ -81,7 +81,7 @@ void mlx5_ib_cont_pages(struct ib_umem *umem, u64 addr, int *count, int *shift,
for (k = 0; k < len; k++) {
if (!(i & mask)) {
tmp = (unsigned long)pfn;
m = min_t(unsigned long, m, find_first_bit(&tmp, sizeof(tmp)));
m = min_t(unsigned long, m, find_first_bit(&tmp, BITS_PER_LONG));
skip = 1 << m;
mask = skip - 1;
base = pfn;
@ -89,7 +89,7 @@ void mlx5_ib_cont_pages(struct ib_umem *umem, u64 addr, int *count, int *shift,
} else {
if (base + p != pfn) {
tmp = (unsigned long)p;
m = find_first_bit(&tmp, sizeof(tmp));
m = find_first_bit(&tmp, BITS_PER_LONG);
skip = 1 << m;
mask = skip - 1;
base = pfn;