staging: rts5208: Added value check

Added value check.
Return value of a function 'ms_set_rw_reg_addr'
called at ms.c:1770 is not checked,
but it is usually checked for this function

Found by Linux Verification Center (linuxtesting.org) with SVACE.

Signed-off-by: Denis Arefev <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/staging/rts5208/ms.c

···
 
 		retval = ms_set_rw_reg_addr(chip, OVERWRITE_FLAG, MS_EXTRA_SIZE,
 					    SYSTEM_PARAM, (6 + MS_EXTRA_SIZE));
+		if (retval != STATUS_SUCCESS)
+			return STATUS_FAIL;
 
 		ms_set_err_code(chip, MS_NO_ERROR);