brain-hackers_pepepper-mirror
/
linux-brain
mirror of https://github.com/brain-hackers/linux-brain.git
1
0
Fork 0
Code Issues Projects Releases Wiki Activity

mmc: block: Disable CMDQ on the ioctl path 

commit 70b52f09080565030a530a784f1c9948a7f48ca3 upstream.

According to the eMMC Spec:
"When command queuing is enabled (CMDQ Mode En bit in CMDQ_MODE_EN
field is set to ‘1’) class 11 commands are the only method through
which data transfer tasks can be issued. Existing data transfer
commands, namely CMD18/CMD17 and CMD25/CMD24, are not supported when
command queuing is enabled."
which means if CMDQ is enabled, the FFU commands will not be supported.
To fix this issue, just simply disable CMDQ on the ioctl path, and
re-enable CMDQ once ioctl request is completed.

Tested-by: Michael Brunner <Michael.Brunner@kontron.com>
Signed-off-by: Bean Huo <beanhuo@micron.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Fixes: 1e8e55b670 (mmc: block: Add CQE support)
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20210504203209.361597-1-huobean@gmail.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Bean Huo 2021-05-04 22:32:09 +02:00 committed by Greg Kroah-Hartman
parent 90d29149e3
commit 5712b828b8
1 changed files with 8 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
drivers/mmc/core/block.c
View File

@ -1053,6 +1053,12 @@ static void mmc_blk_issue_drv_op(struct mmc_queue *mq, struct request *req)
switch (mq_rq->drv_op) {
case MMC_DRV_OP_IOCTL:
if (card->ext_csd.cmdq_en) {
ret = mmc_cmdq_disable(card);
if (ret)
break;
}
fallthrough;
case MMC_DRV_OP_IOCTL_RPMB:
idata = mq_rq->drv_op_data;
for (i = 0, ret = 0; i < mq_rq->ioc_count; i++) {
@ -1063,6 +1069,8 @@ static void mmc_blk_issue_drv_op(struct mmc_queue *mq, struct request *req)
/* Always switch back to main area after RPMB access */
if (rpmb_ioctl)
mmc_blk_part_switch(card, 0);
else if (card->reenable_cmdq && !card->ext_csd.cmdq_en)
mmc_cmdq_enable(card);
break;
case MMC_DRV_OP_BOOT_WP:
ret = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_BOOT_WP,