The patch adds the enhancement to mmc_ioc_cmd structure to also fill the error message so that user is aware of the error that has occured while sending a command.
Signed-off-by: Shashidhar Hiremath <shashidharh@xxxxxxxxxxxxxxx>
---
drivers/mmc/card/block.c | 4 ++++
include/linux/mmc/ioctl.h | 3 +++
2 files changed, 7 insertions(+), 0 deletions(-)
diff --git a/drivers/mmc/card/block.c b/drivers/mmc/card/block.c
index 0c959c9..12523bb 100644
--- a/drivers/mmc/card/block.c
+++ b/drivers/mmc/card/block.c
@@ -448,6 +448,10 @@ static int mmc_blk_ioctl_cmd(struct block_device *bdev,
if (cmd.error) {
dev_err(mmc_dev(card->host), "%s: cmd error %d\n",
__func__, cmd.error);
+ if (copy_to_user(&(ic_ptr->error)
+ , &cmd.error, sizeof(cmd.error)))
+ err = -EFAULT;
+
err = cmd.error;
goto cmd_rel_host;
}
diff --git a/include/linux/mmc/ioctl.h b/include/linux/mmc/ioctl.h
index 8fa5bc5..3514ddc 100644
--- a/include/linux/mmc/ioctl.h
+++ b/include/linux/mmc/ioctl.h
@@ -39,6 +39,9 @@ struct mmc_ioc_cmd {
/* DAT buffer */
__u64 data_ptr;
+ /* The error status for the Command sent */
+ unsigned int error;
+
};
#define mmc_ioc_cmd_set_data(ic, ptr) ic.data_ptr = (__u64)(unsigned long) ptr
--
1.7.6.4
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