[PATCH 03/11 V2] staging: dgnc: missing NULL check for ioremap in dgnc_do_remap()

The ioremap() function can be failed, so it need to have error handling in dgnc_do_remap(). And also the return type of dgnc_do_remap() should be changed from "void" to "int" Signed-off-by: Daeseok Youn --- V2: the subject line was cut off, I put it completely.

[PATCH 03/11 V2] staging: dgnc: missing NULL check for ioremap in dgnc_do_remap()

The ioremap() function can be failed, so it need to have error handling in dgnc_do_remap(). And also the return type of dgnc_do_remap() should be changed from "void" to "int" Signed-off-by: Daeseok Youn --- V2: the subject line was cut off, I put it completely.