lkml.org 
[lkml]   [2021]   [Nov]   [15]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
SubjectRE: [PATCH v1 2/2] mmc-utils: Add note for CMDQ_MODE_EN runtime value
Date

> From: Bean Huo <beanhuo@micron.com>
>
> Since the Linux kernel commit 70b52f090805 ("mmc: block: Disable CMDQ on
> the ioctl path"), CMDQ in CMDQ_MODE_EN[15] is disabled before reading
> EXT_CSD.
> Therefore, it is more accurate to use sysfs node to check CMDQ_MODE_EN
> value.
> Add a note print to highlight.
>
> Signed-off-by: Bean Huo <beanhuo@micron.com>
Acked-by: Avri Altman <avri.altman@wdc.com>

> ---
> mmc_cmds.c | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/mmc_cmds.c b/mmc_cmds.c
> index ecbde3937c81..46c5f5faae02 100644
> --- a/mmc_cmds.c
> +++ b/mmc_cmds.c
> @@ -1885,6 +1885,8 @@ int do_read_extcsd(int nargs, char **argv)
> (ext_csd[EXT_CSD_CMDQ_DEPTH] & 0x1f) + 1);
> printf("Command Enabled [CMDQ_MODE_EN]: 0x%02x\n",
> ext_csd[EXT_CSD_CMDQ_MODE_EN]);
> + printf("Note: CMDQ_MODE_EN may not indicate the runtime
> CMDQ ON or OFF.\n"
> + "Please check sysfs node
> + '/sys/devices/.../mmc_host/mmcX/mmcX:XXXX/cmdq_en'\n");
> }
> out_free:
> return ret;
> --
> 2.25.1

\
 
 \ /
  Last update: 2021-11-15 10:09    [W:0.212 / U:0.124 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site