p71924506
/
linux_old1
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

mmc: core: improve reasonableness of bus width setting for HS400es 

mmc_select_hs400es() calls mmc_select_bus_width() which will continue
to set 4bit transfer mode if fail to set 8bit mode. The bus width
should not be set to 4bit in HS400es.

When fail to set 8bit mode, need return error directly for HS400es.

Signed-off-by: Hongjie Fang <hongjiefang@asrmicro.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Hongjie Fang 2018-07-31 10:55:09 +08:00 committed by Ulf Hansson
parent e401bfdadd
commit 7f38abf220
1 changed files with 5 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
drivers/mmc/core/mmc.c
View File

@ -1348,8 +1348,12 @@ static int mmc_select_hs400es(struct mmc_card *card)
goto out_err;
err = mmc_select_bus_width(card);
if (err < 0)
if (err != MMC_BUS_WIDTH_8) {
pr_err("%s: switch to 8bit bus width failed, err:%d\n",
mmc_hostname(host), err);
err = err < 0 ? err : -ENOTSUPP;
goto out_err;
}
/* Switch card to HS mode */
err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,