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usb: ohci-da8xx: ensure error return on variable error is set 

Currently when an error occurs when calling devm_gpiod_get_optional or
calling gpiod_to_irq it causes an uninitialized error return in variable
'error' to be returned.  Fix this by ensuring the error variable is set
from da8xx_ohci->oc_gpio and oc_irq.

Thanks to Dan Carpenter for spotting the uninitialized error in the
gpiod_to_irq failure case.

Addresses-Coverity: ("Uninitialized scalar variable")
Fixes: d193abf1c9 ("usb: ohci-da8xx: add vbus and overcurrent gpios")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Cc: stable <stable@vger.kernel.org>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Link: https://lore.kernel.org/r/20200107123901.101190-1-colin.king@canonical.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Colin Ian King 2020-01-07 12:39:01 +00:00 committed by Greg Kroah-Hartman
parent 96a0c12843
commit ba9b40810b
1 changed files with 6 additions and 2 deletions
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8
drivers/usb/host/ohci-da8xx.c
View File

@ -415,13 +415,17 @@ static int ohci_da8xx_probe(struct platform_device *pdev)
}
da8xx_ohci->oc_gpio = devm_gpiod_get_optional(dev, "oc", GPIOD_IN);
if (IS_ERR(da8xx_ohci->oc_gpio))
if (IS_ERR(da8xx_ohci->oc_gpio)) {
error = PTR_ERR(da8xx_ohci->oc_gpio);
goto err;
}
if (da8xx_ohci->oc_gpio) {
oc_irq = gpiod_to_irq(da8xx_ohci->oc_gpio);
if (oc_irq < 0)
if (oc_irq < 0) {
error = oc_irq;
goto err;
}
error = devm_request_threaded_irq(dev, oc_irq, NULL,
ohci_da8xx_oc_thread, IRQF_TRIGGER_RISING |