linux-kernel - [PATCH] scsi: megaraid_sas: Use array

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Date:   Mon, 15 Jun 2020 16:47:18 -0500
From:   "Gustavo A. R. Silva" <gustavoars@...nel.org>
To:     Kashyap Desai <kashyap.desai@...adcom.com>,
        Sumit Saxena <sumit.saxena@...adcom.com>,
        Shivasharan S <shivasharan.srikanteshwara@...adcom.com>,
        "James E.J. Bottomley" <jejb@...ux.ibm.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>
Cc:     megaraidlinux.pdl@...adcom.com, linux-scsi@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        "Gustavo A. R. Silva" <gustavo@...eddedor.com>
Subject: [PATCH] scsi: megaraid_sas: Use array_size() helper

The get_order() function has no 2-factor argument form, so multiplication
factors need to be wrapped in array_size().

This issue was found with the help of Coccinelle and, audited and fixed
manually.

Addresses-KSPP-ID: https://github.com/KSPP/linux/issues/83
Signed-off-by: Gustavo A. R. Silva <gustavoars@...nel.org>
---
 drivers/scsi/megaraid/megaraid_sas_fusion.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/scsi/megaraid/megaraid_sas_fusion.c b/drivers/scsi/megaraid/megaraid_sas_fusion.c
index 319f241da4b6..6de44ed4cde7 100644
--- a/drivers/scsi/megaraid/megaraid_sas_fusion.c
+++ b/drivers/scsi/megaraid/megaraid_sas_fusion.c
@@ -5180,8 +5180,8 @@ megasas_alloc_fusion_context(struct megasas_instance *instance)
 
 	fusion = instance->ctrl_context;
 
-	fusion->log_to_span_pages = get_order(MAX_LOGICAL_DRIVES_EXT *
-					      sizeof(LD_SPAN_INFO));
+	fusion->log_to_span_pages = get_order(array_size(MAX_LOGICAL_DRIVES_EXT,
+					      sizeof(LD_SPAN_INFO)));
 	fusion->log_to_span =
 		(PLD_SPAN_INFO)__get_free_pages(GFP_KERNEL | __GFP_ZERO,
 						fusion->log_to_span_pages);
@@ -5196,8 +5196,8 @@ megasas_alloc_fusion_context(struct megasas_instance *instance)
 		}
 	}
 
-	fusion->load_balance_info_pages = get_order(MAX_LOGICAL_DRIVES_EXT *
-		sizeof(struct LD_LOAD_BALANCE_INFO));
+	fusion->load_balance_info_pages = get_order(array_size(MAX_LOGICAL_DRIVES_EXT,
+		sizeof(struct LD_LOAD_BALANCE_INFO)));
 	fusion->load_balance_info =
 		(struct LD_LOAD_BALANCE_INFO *)__get_free_pages(GFP_KERNEL | __GFP_ZERO,
 		fusion->load_balance_info_pages);
-- 
2.27.0