Building w/ GCC v5.2, the SD card access is broken due to invalid data
in the response command reconstructed at the end of
sh_sdhci_get_response().
Add a memory barrier between the two main steps of this function to
ensure the resp[] table content is consistent before bits reordering.
This fix has been tested Ok on Porter board rev1.0 using v2016.03
release.
Signed-off-by: Yannick Gicquel <yannick.gicq...@iot.bzh>
---
drivers/mmc/sh_sdhi.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/mmc/sh_sdhi.c b/drivers/mmc/sh_sdhi.c
index 30e538c..dc4c686 100644
--- a/drivers/mmc/sh_sdhi.c
+++ b/drivers/mmc/sh_sdhi.c
@@ -430,6 +430,9 @@ static void sh_sdhi_get_response(struct sh_sdhi_host *host,
struct mmc_cmd *cmd)
}
p2 = (unsigned long *)cmd->response;
+
+ barrier();
+
#if defined(__BIG_ENDIAN_BITFIELD)
for (i = 0; i < cnt; i++) {
*p2++ = ((*p1 >> 16) & 0x0000ffff) |
--
1.9.1
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