gpiolib: check descriptors validity before use

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Some functions dereferenced their GPIO descriptor argument without
checking its validity first, potentially leading to an oops when given
an invalid argument.

This patch also makes gpio_get_value() more resilient when given an
invalid GPIO, returning 0 instead of silently crashing.

Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
Cc: Ryan Mallon <rmallon@gmail.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>

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Alexandre Courbot 2013-02-15 14:46:14 +09:00 • committed by Grant Likely

parent b0af9cd9aa

commit bcabdef12d

1 changed files with 65 additions and 47 deletions

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drivers/gpio/gpiolib.c

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