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scsi: zfcp: Use prandom_u32_max() for backoff

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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>
This commit is contained in:
George Spelvin 2020-07-03 15:19:57 +02:00 committed by Martin K. Petersen
parent 919a295abf
commit 0cd0e57ec8
1 changed files with 1 additions and 1 deletions
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2
drivers/s390/scsi/zfcp_fc.c
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@ -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)