linux-kernel - [PATCH] venus: hfi_venus: Fix a warning in venus ISR

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Date:   Wed,  7 Apr 2021 13:56:00 +0300
From:   Stanimir Varbanov <stanimir.varbanov@...aro.org>
To:     linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-msm@...r.kernel.org
Cc:     Mauro Carvalho Chehab <mchehab@...nel.org>,
        Stanimir Varbanov <stanimir.varbanov@...aro.org>
Subject: [PATCH] venus: hfi_venus: Fix a warning in venus ISR

Fix the following smatch warning:

hfi_venus.c:1100 venus_isr() warn: variable dereferenced before check 'hdev' (see line 1097)

Signed-off-by: Stanimir Varbanov <stanimir.varbanov@...aro.org>
---
 drivers/media/platform/qcom/venus/hfi_venus.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/media/platform/qcom/venus/hfi_venus.c b/drivers/media/platform/qcom/venus/hfi_venus.c
index cebb20cf371f..114fcb6ee9a0 100644
--- a/drivers/media/platform/qcom/venus/hfi_venus.c
+++ b/drivers/media/platform/qcom/venus/hfi_venus.c
@@ -1093,13 +1093,16 @@ static irqreturn_t venus_isr_thread(struct venus_core *core)
 static irqreturn_t venus_isr(struct venus_core *core)
 {
 	struct venus_hfi_device *hdev = to_hfi_priv(core);
+	void __iomem *cpu_cs_base;
+	void __iomem *wrapper_base;
 	u32 status;
-	void __iomem *cpu_cs_base = hdev->core->cpu_cs_base;
-	void __iomem *wrapper_base = hdev->core->wrapper_base;
 
 	if (!hdev)
 		return IRQ_NONE;
 
+	cpu_cs_base = hdev->core->cpu_cs_base;
+	wrapper_base = hdev->core->wrapper_base;
+
 	status = readl(wrapper_base + WRAPPER_INTR_STATUS);
 	if (IS_V6(core)) {
 		if (status & WRAPPER_INTR_STATUS_A2H_MASK ||
-- 
2.25.1