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A number of drivers were comparing request_region() with 0, others were passing 0 instead of NULL as a pointer argument. This led to the following sparse warning, for example: cb7210/cb7210.c:1043:72: warning: Using plain integer as NULL pointer Use !request_region() to test for NULL return and use NULL instead of 0 as pointer parameter. Signed-off-by: Dave Penkler <dpenkler@gmail.com> Link: https://lore.kernel.org/r/20250114165403.16410-4-dpenkler@gmail.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>