[PATCH v2 02/10] mci: mmc_send_tuning: actually point data.dest at the buffer

[Sascha Hauer]

mmc_send_tuning() allocates a tuning-block-sized buffer with calloc()
but never assigns it to data.dest, so the host transfers the tuning
block to wherever data.dest happened to be (uninitialised — typically
NULL). The subsequent memcmp against the expected pattern then always
mismatches, so any caller would observe -EIO regardless of the
controller actually receiving the block correctly.

Fix by setting data.dest to the buffer.

Reviewed-by: Ahmad Fatoum <a.fatoum at pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer at pengutronix.de>
---
 drivers/mci/mci-core.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/mci/mci-core.c b/drivers/mci/mci-core.c
index 33934a6a35..23b9117869 100644
--- a/drivers/mci/mci-core.c
+++ b/drivers/mci/mci-core.c
@@ -1684,6 +1684,7 @@ int mmc_send_tuning(struct mci *mci, u32 opcode)
 	mci_setup_cmd(&cmd, opcode, 0, MMC_RSP_R1 | MMC_CMD_ADTC);
 
 	cmd.data = xzalloc(sizeof(struct mci_data));
+	cmd.data->dest = data_buf;
 	cmd.data->blocksize = size;
 	cmd.data->blocks = 1;
 	cmd.data->flags = MMC_DATA_READ;

-- 
2.47.3