[Trusty][PATCH] mmc: rtsx: add R1-no-CRC mmc command type handle

Adam Lee adam.lee at canonical.com
Thu Sep 4 08:51:38 UTC 2014


From: Micky Ching <micky_ching at realsil.com.cn>

BugLink: http://bugs.launchpad.net/bugs/1365378

a27fbf2f067b0cd ("mmc: add ignorance case for CMD13 CRC error") produced
a cmd.flags unhandled in realtek pci host driver.  This will make MMC
card fail to initialize, this patch is used to handle the new cmd.flags
condition and MMC card can be used.

Signed-off-by: Micky Ching <micky_ching at realsil.com.cn>
Signed-off-by: Ulf Hansson <ulf.hansson at linaro.org>
Signed-off-by: Chris Ball <chris at printf.net>
(cherry picked from commit 5027251eced6e34315a52bd841279df957f627bb)
Signed-off-by: Adam Lee <adam.lee at canonical.com>
---
 drivers/mmc/host/rtsx_pci_sdmmc.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/mmc/host/rtsx_pci_sdmmc.c b/drivers/mmc/host/rtsx_pci_sdmmc.c
index c46feda..7e18661 100644
--- a/drivers/mmc/host/rtsx_pci_sdmmc.c
+++ b/drivers/mmc/host/rtsx_pci_sdmmc.c
@@ -246,6 +246,9 @@ static void sd_send_cmd_get_rsp(struct realtek_pci_sdmmc *host,
 	case MMC_RSP_R1:
 		rsp_type = SD_RSP_TYPE_R1;
 		break;
+	case MMC_RSP_R1 & ~MMC_RSP_CRC:
+		rsp_type = SD_RSP_TYPE_R1 | SD_NO_CHECK_CRC7;
+		break;
 	case MMC_RSP_R1B:
 		rsp_type = SD_RSP_TYPE_R1b;
 		break;
-- 
2.1.0





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