linux-kernel - [PATCH] staging: rts5208: fix gcc-8 logic error warning

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Date:   Tue,  5 Sep 2017 09:33:32 +0200
From:   Arnd Bergmann <arnd@...db.de>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     Arnd Bergmann <arnd@...db.de>, Wayne Porter <wporter82@...il.com>,
        devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org
Subject: [PATCH] staging: rts5208: fix gcc-8 logic error warning

As gcc-8 points out, the bit mask check makes no sense here:

drivers/staging/rts5208/sd.c: In function 'ext_sd_send_cmd_get_rsp':
drivers/staging/rts5208/sd.c:4130:25: error: bitwise comparison always evaluates to true [-Werror=tautological-compare]

However, the code is even more bogus, as we have already
checked for the SD_RSP_TYPE_R0 case earlier in the function
and returned success. As seen in the mmc/sd driver core,
SD_RSP_TYPE_R0 means "no response" anyway, so checking for
a particular response would not help either.

This just removes the nonsensical code to get rid of the
warning.

Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
 drivers/staging/rts5208/sd.c | 6 ------
 1 file changed, 6 deletions(-)

diff --git a/drivers/staging/rts5208/sd.c b/drivers/staging/rts5208/sd.c
index 4033a2cf7ac9..d548bc695f9e 100644
--- a/drivers/staging/rts5208/sd.c
+++ b/drivers/staging/rts5208/sd.c
@@ -4125,12 +4125,6 @@ int ext_sd_send_cmd_get_rsp(struct rtsx_chip *chip, u8 cmd_idx, u32 arg,
 					rtsx_trace(chip);
 					return STATUS_FAIL;
 				}
-
-			} else if (rsp_type == SD_RSP_TYPE_R0) {
-				if ((ptr[3] & 0x1E) != 0x03) {
-					rtsx_trace(chip);
-					return STATUS_FAIL;
-				}
 			}
 		}
 	}
-- 
2.9.0