linux-kernel - [PATCH] wifi: ath11k: Add missing check for ioremap

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Message-Id: <20230608022858.27405-1-jiasheng@iscas.ac.cn>
Date:   Thu,  8 Jun 2023 10:28:58 +0800
From:   Jiasheng Jiang <jiasheng@...as.ac.cn>
To:     kvalo@...nel.org, akolli@...eaurora.org
Cc:     ath11k@...ts.infradead.org, linux-wireless@...r.kernel.org,
        linux-kernel@...r.kernel.org, Jiasheng Jiang <jiasheng@...as.ac.cn>
Subject: [PATCH] wifi: ath11k: Add missing check for ioremap

Add check for ioremap() and return the error if it fails in order to
guarantee the success of ioremap(), same as in
ath11k_qmi_load_file_target_mem().

Fixes: 6ac04bdc5edb ("ath11k: Use reserved host DDR addresses from DT for PCI devices")
Signed-off-by: Jiasheng Jiang <jiasheng@...as.ac.cn>
---
 drivers/net/wireless/ath/ath11k/qmi.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/net/wireless/ath/ath11k/qmi.c b/drivers/net/wireless/ath/ath11k/qmi.c
index ab923e24b0a9..f9b3f90afffb 100644
--- a/drivers/net/wireless/ath/ath11k/qmi.c
+++ b/drivers/net/wireless/ath/ath11k/qmi.c
@@ -2058,6 +2058,8 @@ static int ath11k_qmi_assign_target_mem_chunk(struct ath11k_base *ab)
 			ab->qmi.target_mem[idx].iaddr =
 				ioremap(ab->qmi.target_mem[idx].paddr,
 					ab->qmi.target_mem[i].size);
+			if (!ab->qmi.target_mem[idx].iaddr)
+				return -EIO;
 			ab->qmi.target_mem[idx].size = ab->qmi.target_mem[i].size;
 			host_ddr_sz = ab->qmi.target_mem[i].size;
 			ab->qmi.target_mem[idx].type = ab->qmi.target_mem[i].type;
@@ -2083,6 +2085,8 @@ static int ath11k_qmi_assign_target_mem_chunk(struct ath11k_base *ab)
 					ab->qmi.target_mem[idx].iaddr =
 						ioremap(ab->qmi.target_mem[idx].paddr,
 							ab->qmi.target_mem[i].size);
+					if (!ab->qmi.target_mem[idx].iaddr)
+						return -EIO;
 				} else {
 					ab->qmi.target_mem[idx].paddr =
 						ATH11K_QMI_CALDB_ADDRESS;
-- 
2.25.1