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authorGeorge Spelvin <lkml@sdf.org>2020-07-03 15:19:57 +0200
committerMartin K. Petersen <martin.petersen@oracle.com>2020-07-08 00:50:52 -0400
commit0cd0e57ec858edda580fb90b53df5269216b61b2 (patch)
tree05f9c11d23e8f56cb62aa2752d97896722e29224 /drivers/s390/scsi
parent919a295abf968cec6ffd3c629241b2e626cf0f5d (diff)
scsi: zfcp: Use prandom_u32_max() for backoff
We don't need crypto-grade random numbers for randomized backoffs. Instead use prandom_u32_max(ep_ro) which generates a pseudo-random number uniformly distributed in the interval [0, ep_ro). Link: https://lore.kernel.org/r/8fc7c4c4069ff1783f4a9ccd84a923f581a09ec5.1593780621.git.bblock@linux.ibm.com Reviewed-by: Steffen Maier <maier@linux.ibm.com> Signed-off-by: George Spelvin <lkml@sdf.org> Signed-off-by: Benjamin Block <bblock@linux.ibm.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/s390/scsi')
-rw-r--r--drivers/s390/scsi/zfcp_fc.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/s390/scsi/zfcp_fc.c b/drivers/s390/scsi/zfcp_fc.c
index b018b61bd168..d24cafe02708 100644
--- a/drivers/s390/scsi/zfcp_fc.c
+++ b/drivers/s390/scsi/zfcp_fc.c
@@ -48,7 +48,7 @@ unsigned int zfcp_fc_port_scan_backoff(void)
{
if (!port_scan_backoff)
return 0;
- return get_random_int() % port_scan_backoff;
+ return prandom_u32_max(port_scan_backoff);
}
static void zfcp_fc_port_scan_time(struct zfcp_adapter *adapter)