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From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org,
	stable@vger.kernel.org
Cc: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>,
	Luiz Augusto von Dentz <luiz.von.dentz@intel.com>,
	Sasha Levin <sashal@kernel.org>
Subject: [PATCH 5.15 130/317] Bluetooth: hci_qca: don't use IS_ERR_OR_NULL() with gpiod_get_optional()
Date: Sun, 24 Mar 2024 19:31:50 -0400
Message-ID: <20240324233458.1352854-131-sashal@kernel.org>
In-Reply-To: <20240324233458.1352854-1-sashal@kernel.org>
References: <20240324233458.1352854-1-sashal@kernel.org>
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From: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>

[ Upstream commit 56d074d26c5828773b00b2185dd7e1d08273b8e8 ]

The optional variants for the gpiod_get() family of functions return NULL
if the GPIO in question is not associated with this device. They return
ERR_PTR() on any other error. NULL descriptors are graciously handled by
GPIOLIB and can be safely passed to any of the GPIO consumer interfaces
as they will return 0 and act as if the function succeeded. If one is
using the optional variant, then there's no point in checking for NULL.

Fixes: 6845667146a2 ("Bluetooth: hci_qca: Fix NULL vs IS_ERR_OR_NULL check in qca_serdev_probe")
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/bluetooth/hci_qca.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/bluetooth/hci_qca.c b/drivers/bluetooth/hci_qca.c
index 7c641cabea7c8..d5f408851a005 100644
--- a/drivers/bluetooth/hci_qca.c
+++ b/drivers/bluetooth/hci_qca.c
@@ -2087,7 +2087,7 @@ static int qca_serdev_probe(struct serdev_device *serdev)
 
 		qcadev->bt_en = devm_gpiod_get_optional(&serdev->dev, "enable",
 					       GPIOD_OUT_LOW);
-		if (IS_ERR_OR_NULL(qcadev->bt_en) &&
+		if (IS_ERR(qcadev->bt_en) &&
 		    (data->soc_type == QCA_WCN6750 ||
 		     data->soc_type == QCA_WCN6855)) {
 			dev_err(&serdev->dev, "failed to acquire BT_EN gpio\n");
@@ -2096,7 +2096,7 @@ static int qca_serdev_probe(struct serdev_device *serdev)
 
 		qcadev->sw_ctrl = devm_gpiod_get_optional(&serdev->dev, "swctrl",
 					       GPIOD_IN);
-		if (IS_ERR_OR_NULL(qcadev->sw_ctrl) &&
+		if (IS_ERR(qcadev->sw_ctrl) &&
 		    (data->soc_type == QCA_WCN6750 ||
 		     data->soc_type == QCA_WCN6855))
 			dev_warn(&serdev->dev, "failed to acquire SW_CTRL gpio\n");
@@ -2120,7 +2120,7 @@ static int qca_serdev_probe(struct serdev_device *serdev)
 
 		qcadev->bt_en = devm_gpiod_get_optional(&serdev->dev, "enable",
 					       GPIOD_OUT_LOW);
-		if (IS_ERR_OR_NULL(qcadev->bt_en)) {
+		if (IS_ERR(qcadev->bt_en)) {
 			dev_warn(&serdev->dev, "failed to acquire enable gpio\n");
 			power_ctrl_enabled = false;
 		}
-- 
2.43.0