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Bluetooth: hci_intel: Fix null gpio desc pointer dereference 

gpiod_get_optional can return either ERR_PTR or NULL pointer.
NULL case is not tested and then dereferenced later in desc_to_gpio.
Fix this by using non optional version which returns ERR_PTR in any
error case (this is not an optional gpio).
Use the same non optional version for the host-wake gpio.

Fixes: 765ea3abd1 ("Bluetooth: hci_intel: Retrieve host-wake IRQ")
Signed-off-by: Loic Poulain <loic.poulain@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Loic Poulain 2016-04-28 18:48:25 +02:00 committed by Marcel Holtmann
parent bb7f4f0bce
commit 32b9ccbc35
1 changed files with 2 additions and 4 deletions
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6
drivers/bluetooth/hci_intel.c
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@ -1210,8 +1210,7 @@ static int intel_probe(struct platform_device *pdev)
idev->pdev = pdev;
idev->reset = devm_gpiod_get_optional(&pdev->dev, "reset",
GPIOD_OUT_LOW);
idev->reset = devm_gpiod_get(&pdev->dev, "reset", GPIOD_OUT_LOW);
if (IS_ERR(idev->reset)) {
dev_err(&pdev->dev, "Unable to retrieve gpio\n");
return PTR_ERR(idev->reset);
@ -1223,8 +1222,7 @@ static int intel_probe(struct platform_device *pdev)
dev_err(&pdev->dev, "No IRQ, falling back to gpio-irq\n");
host_wake = devm_gpiod_get_optional(&pdev->dev, "host-wake",
GPIOD_IN);
host_wake = devm_gpiod_get(&pdev->dev, "host-wake", GPIOD_IN);
if (IS_ERR(host_wake)) {
dev_err(&pdev->dev, "Unable to retrieve IRQ\n");
goto no_irq;