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Message-ID: <20240822164853.231087-1-krzysztof.kozlowski@linaro.org>
Date: Thu, 22 Aug 2024 18:48:50 +0200
From: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To: Bjorn Andersson <andersson@...nel.org>,
Konrad Dybcio <konradybcio@...nel.org>,
Andy Gross <agross@...eaurora.org>,
linux-arm-msm@...r.kernel.org,
linux-kernel@...r.kernel.org
Cc: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Subject: [PATCH 1/3] soc: qcom: pmic_glink_altmode: simplify locking with guard()
Simplify error handling (less gotos) over locks with guard().
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
---
drivers/soc/qcom/pmic_glink_altmode.c | 11 +++++------
1 file changed, 5 insertions(+), 6 deletions(-)
diff --git a/drivers/soc/qcom/pmic_glink_altmode.c b/drivers/soc/qcom/pmic_glink_altmode.c
index 463b1c528831..bd06ce161804 100644
--- a/drivers/soc/qcom/pmic_glink_altmode.c
+++ b/drivers/soc/qcom/pmic_glink_altmode.c
@@ -5,6 +5,7 @@
*/
#include <linux/auxiliary_bus.h>
#include <linux/bitfield.h>
+#include <linux/cleanup.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_device.h>
@@ -114,7 +115,7 @@ static int pmic_glink_altmode_request(struct pmic_glink_altmode *altmode, u32 cm
* The USBC_CMD_WRITE_REQ ack doesn't identify the request, so wait for
* one ack at a time.
*/
- mutex_lock(&altmode->lock);
+ guard(mutex)(&altmode->lock);
req.hdr.owner = cpu_to_le32(altmode->owner_id);
req.hdr.type = cpu_to_le32(PMIC_GLINK_REQ_RESP);
@@ -125,18 +126,16 @@ static int pmic_glink_altmode_request(struct pmic_glink_altmode *altmode, u32 cm
ret = pmic_glink_send(altmode->client, &req, sizeof(req));
if (ret) {
dev_err(altmode->dev, "failed to send altmode request: %#x (%d)\n", cmd, ret);
- goto out_unlock;
+ return ret;
}
left = wait_for_completion_timeout(&altmode->pan_ack, 5 * HZ);
if (!left) {
dev_err(altmode->dev, "timeout waiting for altmode request ack for: %#x\n", cmd);
- ret = -ETIMEDOUT;
+ return -ETIMEDOUT;
}
-out_unlock:
- mutex_unlock(&altmode->lock);
- return ret;
+ return 0;
}
static void pmic_glink_altmode_enable_dp(struct pmic_glink_altmode *altmode,
--
2.43.0
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