linux-kernel - [PATCH AUTOSEL 5.15 53/98] scsi: pm8001: Fix pm80xx_pci_mem

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Message-Id: <20220401143742.1952163-53-sashal@kernel.org>
Date:   Fri,  1 Apr 2022 10:36:57 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Damien Le Moal <damien.lemoal@...nsource.wdc.com>,
        Jack Wang <jinpu.wang@...os.com>,
        "Martin K . Petersen" <martin.petersen@...cle.com>,
        Sasha Levin <sashal@...nel.org>, jinpu.wang@...ud.ionos.com,
        jejb@...ux.ibm.com, linux-scsi@...r.kernel.org
Subject: [PATCH AUTOSEL 5.15 53/98] scsi: pm8001: Fix pm80xx_pci_mem_copy() interface

From: Damien Le Moal <damien.lemoal@...nsource.wdc.com>

[ Upstream commit 3762d8f6edcdb03994c919f9487fd6d336c06561 ]

The declaration of the local variable destination1 in pm80xx_pci_mem_copy()
as a pointer to a u32 results in the sparse warning:

warning: incorrect type in assignment (different base types)
    expected unsigned int [usertype]
    got restricted __le32 [usertype]

Furthermore, the destination" argument of pm80xx_pci_mem_copy() is wrongly
declared with the const attribute.

Fix both problems by changing the type of the "destination" argument to
"__le32 *" and use this argument directly inside the pm80xx_pci_mem_copy()
function, thus removing the need for the destination1 local variable.

Link: https://lore.kernel.org/r/20220220031810.738362-6-damien.lemoal@opensource.wdc.com
Reviewed-by: Jack Wang <jinpu.wang@...os.com>
Signed-off-by: Damien Le Moal <damien.lemoal@...nsource.wdc.com>
Signed-off-by: Martin K. Petersen <martin.petersen@...cle.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/scsi/pm8001/pm80xx_hwi.c | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/drivers/scsi/pm8001/pm80xx_hwi.c b/drivers/scsi/pm8001/pm80xx_hwi.c
index 3056f3615ab8..287887d8d729 100644
--- a/drivers/scsi/pm8001/pm80xx_hwi.c
+++ b/drivers/scsi/pm8001/pm80xx_hwi.c
@@ -66,18 +66,16 @@ int pm80xx_bar4_shift(struct pm8001_hba_info *pm8001_ha, u32 shift_value)
 }
 
 static void pm80xx_pci_mem_copy(struct pm8001_hba_info  *pm8001_ha, u32 soffset,
-				const void *destination,
+				__le32 *destination,
 				u32 dw_count, u32 bus_base_number)
 {
 	u32 index, value, offset;
-	u32 *destination1;
-	destination1 = (u32 *)destination;
 
-	for (index = 0; index < dw_count; index += 4, destination1++) {
+	for (index = 0; index < dw_count; index += 4, destination++) {
 		offset = (soffset + index);
 		if (offset < (64 * 1024)) {
 			value = pm8001_cr32(pm8001_ha, bus_base_number, offset);
-			*destination1 =  cpu_to_le32(value);
+			*destination = cpu_to_le32(value);
 		}
 	}
 	return;
-- 
2.34.1