tree fd296df6645eb783150cac054f698331504a6980
parent 15ca92156e6242060dff91c8d8e7fe7ae82d424a
author Marek Vasut <marex@denx.de> 1474892093 +0200
committer Mark Brown <broonie@kernel.org> 1474906126 -0700

spi: imx: Gracefully handle NULL master->cs_gpios

It is possible that master->cs_gpios is NULL after spi_bitbang_start(),
this happens if the master has no CS GPIOs specified in DT. Check for
this case after spi_bitbang_start() to prevent NULL pointer dereference
in the subsequent for loop, which accesses the master->cs_gpios field.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Martin Kaiser <martin@kaiser.cx>
Cc: Mark Brown <broonie@kernel.org>
Signed-off-by: Mark Brown <broonie@kernel.org>