linux-kernel - [PATCH] scsi: hpsa: add return value check for remap_pci

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Message-Id: <20260125150244.2115157-1-lihaoxiang@isrc.iscas.ac.cn>
Date: Sun, 25 Jan 2026 23:02:44 +0800
From: Haoxiang Li <lihaoxiang@...c.iscas.ac.cn>
To: don.brace@...rochip.com,
	James.Bottomley@...senPartnership.com,
	martin.petersen@...cle.com
Cc: storagedev@...rochip.com,
	linux-scsi@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Haoxiang Li <lihaoxiang@...c.iscas.ac.cn>
Subject: [PATCH] scsi: hpsa: add return value check for remap_pci_mem()

In hpsa_enter_performant_mode(), add return value check
for remap_pci_mem() to prevent potential null pointer
dereference.

Signed-off-by: Haoxiang Li <lihaoxiang@...c.iscas.ac.cn>
---
 drivers/scsi/hpsa.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/scsi/hpsa.c b/drivers/scsi/hpsa.c
index 3654b12c5d5a..f3118695f320 100644
--- a/drivers/scsi/hpsa.c
+++ b/drivers/scsi/hpsa.c
@@ -9323,6 +9323,8 @@ static int hpsa_enter_performant_mode(struct ctlr_info *h, u32 trans_support)
 					cfg_offset + bft2_offset,
 					ARRAY_SIZE(bft2) *
 					sizeof(*h->ioaccel2_bft2_regs));
+		if (!h->ioaccel2_bft2_regs)
+			return -ENODEV;
 		for (i = 0; i < ARRAY_SIZE(bft2); i++)
 			writel(bft2[i], &h->ioaccel2_bft2_regs[i]);
 	}
-- 
2.25.1