linux-kernel - [PATCH 10/15] mmc: host: rtsx_usb_sdmmc: Remove set but unused variable 'err'

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Message-Id: <20200701124702.908713-11-lee.jones@linaro.org>
Date:   Wed,  1 Jul 2020 13:46:57 +0100
From:   Lee Jones <lee.jones@...aro.org>
To:     ulf.hansson@...aro.org
Cc:     linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Lee Jones <lee.jones@...aro.org>,
        Roger Tseng <rogerable@...ltek.com>
Subject: [PATCH 10/15] mmc: host: rtsx_usb_sdmmc: Remove set but unused variable 'err'

Seeing as sd_wait_data_idle() returns void and only a very specific
read value is checked, there doesn't seem to be a good reason to
check the return value of rtsx_pci_read_register().  So remove
the assignment and definition of 'err'.

Squashes the following W=1 kernel build warning:

 drivers/mmc/host/rtsx_usb_sdmmc.c: In function ‘sd_wait_data_idle’:
 drivers/mmc/host/rtsx_usb_sdmmc.c:657:6: warning: variable ‘err’ set but not used [-Wunused-but-set-variable]
 657 | int err, i;
 | ^~~

Cc: Roger Tseng <rogerable@...ltek.com>
Signed-off-by: Lee Jones <lee.jones@...aro.org>
---
 drivers/mmc/host/rtsx_usb_sdmmc.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/mmc/host/rtsx_usb_sdmmc.c b/drivers/mmc/host/rtsx_usb_sdmmc.c
index a7084c50ad65f..7225d9312af8c 100644
--- a/drivers/mmc/host/rtsx_usb_sdmmc.c
+++ b/drivers/mmc/host/rtsx_usb_sdmmc.c
@@ -654,12 +654,11 @@ static u8 sd_search_final_phase(struct rtsx_usb_sdmmc *host, u32 phase_map)
 
 static void sd_wait_data_idle(struct rtsx_usb_sdmmc *host)
 {
-	int err, i;
+	int i;
 	u8 val = 0;
 
 	for (i = 0; i < 100; i++) {
-		err = rtsx_usb_ep0_read_register(host->ucr,
-				SD_DATA_STATE, &val);
+		rtsx_usb_ep0_read_register(host->ucr, SD_DATA_STATE, &val);
 		if (val & SD_DATA_IDLE)
 			return;
 
-- 
2.25.1