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SubjectRe: [PATCH 05/15] hisi_sas: use safe BITS_PER_BYTE for slot tag size calculation
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On 09/06/2016 05:36 PM, John Garry wrote:
> 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>
> ---
> drivers/scsi/hisi_sas/hisi_sas_main.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/scsi/hisi_sas/hisi_sas_main.c b/drivers/scsi/hisi_sas/hisi_sas_main.c
> index 0e48751..dcb17a3 100644
> --- a/drivers/scsi/hisi_sas/hisi_sas_main.c
> +++ b/drivers/scsi/hisi_sas/hisi_sas_main.c
> @@ -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;
>
Reviewed-by: Hannes Reinecke <hare@suse.com>

Cheers,

Hannes
--
Dr. Hannes Reinecke zSeries & Storage
hare@suse.de +49 911 74053 688
SUSE LINUX Products GmbH, Maxfeldstr. 5, 90409 Nürnberg
GF: J. Hawn, J. Guild, F. Imendörffer, HRB 16746 (AG Nürnberg)

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