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[ Upstream commit413bf4e857] devm_ioremap() doesn't return error pointers, it returns NULL on error. Update the check accordingly. Fixes:e86bd43bcf("watchdog: sa1100: use platform device registration") Signed-off-by: Chen Ni <nichen@iscas.ac.cn> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Link: https://lore.kernel.org/r/20240426075808.1582678-1-nichen@iscas.ac.cn Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org> Signed-off-by: Sasha Levin <sashal@kernel.org>