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Commit d6f434e8 authored by Nicholas Krause's avatar Nicholas Krause Committed by Linus Walleij
Browse files

gpio: davinci: Fix possible NULL pointer deference 



This fixes a possible NULL pointer deference in the function,
davinci_gpio_probe due to the function, gpio2regs being able
to return a NULL pointer if it rans to get the registers for
the gpio devices on a davinci board. Furthermore if this does
arise return -ENXIO to signal callers that this case has arisen
and avoiding setting the regs or other pointer values on the

Signed-off-by: default avatarNicholas Krause <xerofoify@gmail.com>
Reviewed-by: default avatarAlexandre Courbot <acourbot@nvidia.com>
Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
parent ed07247d

drivers/gpio/gpio-davinci.c

+2 −0
Original line number Diff line number Diff line
@@ -257,6 +257,8 @@ static int davinci_gpio_probe(struct platform_device *pdev) 
		spin_lock_init(&chips[i].lock);



		regs = gpio2regs(base);

		if (!regs)

			return -ENXIO;

		chips[i].regs = regs;

		chips[i].set_data = &regs->set_data;

		chips[i].clr_data = &regs->clr_data;