linux-kernel - [PATCH AUTOSEL 4.9 08/20] crypto: qat - check return code of qat_hal_rd_rel

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Message-Id: <20210704231155.1491795-8-sashal@kernel.org>
Date:   Sun,  4 Jul 2021 19:11:43 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Jack Xu <jack.xu@...el.com>, Zhehui Xiang <zhehui.xiang@...el.com>,
        Giovanni Cabiddu <giovanni.cabiddu@...el.com>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        Sasha Levin <sashal@...nel.org>, qat-linux@...el.com,
        linux-crypto@...r.kernel.org, clang-built-linux@...glegroups.com
Subject: [PATCH AUTOSEL 4.9 08/20] crypto: qat - check return code of qat_hal_rd_rel_reg()

From: Jack Xu <jack.xu@...el.com>

[ Upstream commit 96b57229209490c8bca4335b01a426a96173dc56 ]

Check the return code of the function qat_hal_rd_rel_reg() and return it
to the caller.

This is to fix the following warning when compiling the driver with
clang scan-build:

    drivers/crypto/qat/qat_common/qat_hal.c:1436:2: warning: 6th function call argument is an uninitialized value

Signed-off-by: Jack Xu <jack.xu@...el.com>
Co-developed-by: Zhehui Xiang <zhehui.xiang@...el.com>
Signed-off-by: Zhehui Xiang <zhehui.xiang@...el.com>
Reviewed-by: Giovanni Cabiddu <giovanni.cabiddu@...el.com>
Signed-off-by: Herbert Xu <herbert@...dor.apana.org.au>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/crypto/qat/qat_common/qat_hal.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/crypto/qat/qat_common/qat_hal.c b/drivers/crypto/qat/qat_common/qat_hal.c
index 8c4fd255a601..cdf80c16a033 100644
--- a/drivers/crypto/qat/qat_common/qat_hal.c
+++ b/drivers/crypto/qat/qat_common/qat_hal.c
@@ -1255,7 +1255,11 @@ static int qat_hal_put_rel_wr_xfer(struct icp_qat_fw_loader_handle *handle,
 		pr_err("QAT: bad xfrAddr=0x%x\n", xfr_addr);
 		return -EINVAL;
 	}
-	qat_hal_rd_rel_reg(handle, ae, ctx, ICP_GPB_REL, gprnum, &gprval);
+	status = qat_hal_rd_rel_reg(handle, ae, ctx, ICP_GPB_REL, gprnum, &gprval);
+	if (status) {
+		pr_err("QAT: failed to read register");
+		return status;
+	}
 	gpr_addr = qat_hal_get_reg_addr(ICP_GPB_REL, gprnum);
 	data16low = 0xffff & data;
 	data16hi = 0xffff & (data >> 0x10);
-- 
2.30.2