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authorWu, Josh <Josh.wu@atmel.com>2014-05-07 16:50:45 +0800
committerAndreas Bießmann <andreas.devel@googlemail.com>2014-05-27 00:10:45 +0200
commit7d82d897722f57389ebe15924f47fab452cc3a19 (patch)
tree73206e6aa46e6e1d32ecb51f050a3507505ca555 /common/cmd_io.c
parent495275925192edb0c5bd6cb1e3b6f85162ffd06b (diff)
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gpio: at91: add sanity check for the NULL pointer
We need check the NULL pointer as at91_pio_get_port() may return NULL. Also print a error message when at91_pio_get_port() failed otherwise we cannot notice the failure. Signed-off-by: Josh Wu <josh.wu@atmel.com> Signed-off-by: Andreas Bießmann <andreas.devel@googlemail.com>
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