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scsi: hisi_sas: use safe BITS_PER_BYTE for slot tag size calculation

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The memory calculation for the tags bitmap should use BITS_PER_BYTE
macro instead of coincidental same value of sizeof(unsigned long).

Signed-off-by: John Garry <john.garry@huawei.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
John Garry 2016-09-06 23:36:15 +08:00 committed by Martin K. Petersen
parent 59ba49f9d6
commit 433f569601
1 changed files with 1 additions and 1 deletions
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drivers/scsi/hisi_sas/hisi_sas_main.c
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@ -1309,7 +1309,7 @@ static int hisi_sas_alloc(struct hisi_hba *hisi_hba, struct Scsi_Host *shost)
memset(hisi_hba->breakpoint, 0, s);
hisi_hba->slot_index_count = max_command_entries;
s = hisi_hba->slot_index_count / sizeof(unsigned long);
s = hisi_hba->slot_index_count / BITS_PER_BYTE;
hisi_hba->slot_index_tags = devm_kzalloc(dev, s, GFP_KERNEL);
if (!hisi_hba->slot_index_tags)
goto err_out;