* [PATCH] mmc: block: Let CMD13 polling only for MMC IOCTLS with the R1B response
@ 2020-12-02 20:23 Bean Huo
2020-12-04 14:38 ` Ulf Hansson
0 siblings, 1 reply; 3+ messages in thread
From: Bean Huo @ 2020-12-02 20:23 UTC (permalink / raw)
To: ulf.hansson, axboe, baolin.wang, beanhuo, arnd, vbadigan,
richard.peng, chaotian.jing, avri.altman, linux-mmc,
linux-kernel, zliua, zszubbocsev
Cc: stable
From: Bean Huo <beanhuo@micron.com>
The CMD13 polling is only needed for the command with R1B Resp. For the
command with R1 Resp, such as open-ended multiple block read/write
(CMD18/25) commands, the device will just wait for its next paired command.
There is no need to poll device status through CMD13.
Meanwhile, based on the original change commit (mmc: block: Add CMD13 polling
for MMC IOCTLS with R1B response), and comment in __mmc_blk_ioctl_cmd(),
current code is not in line with its original purpose. So fix it with this patch.
Fixes: a0d4c7eb71dd ("mmc: block: Add CMD13 polling for MMC IOCTLS with R1B response")
Cc: stable@vger.kernel.org
Reported-by: Zhan Liu <zliua@micron.com>
Signed-off-by: Zhan Liu <zliua@micron.com>
Signed-off-by: Bean Huo <beanhuo@micron.com>
---
drivers/mmc/core/block.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/mmc/core/block.c b/drivers/mmc/core/block.c
index 8d3df0be0355..42e27a298218 100644
--- a/drivers/mmc/core/block.c
+++ b/drivers/mmc/core/block.c
@@ -580,7 +580,7 @@ static int __mmc_blk_ioctl_cmd(struct mmc_card *card, struct mmc_blk_data *md,
memcpy(&(idata->ic.response), cmd.resp, sizeof(cmd.resp));
- if (idata->rpmb || (cmd.flags & MMC_RSP_R1B)) {
+ if (idata->rpmb || (cmd.flags & MMC_RSP_R1B) == MMC_RSP_R1B) {
/*
* Ensure RPMB/R1B command has completed by polling CMD13
* "Send Status".
--
2.17.1
^ permalink raw reply related [flat|nested] 3+ messages in thread* Re: [PATCH] mmc: block: Let CMD13 polling only for MMC IOCTLS with the R1B response
2020-12-02 20:23 [PATCH] mmc: block: Let CMD13 polling only for MMC IOCTLS with the R1B response Bean Huo
@ 2020-12-04 14:38 ` Ulf Hansson
2020-12-04 15:54 ` Bean Huo
0 siblings, 1 reply; 3+ messages in thread
From: Ulf Hansson @ 2020-12-04 14:38 UTC (permalink / raw)
To: Bean Huo
Cc: Jens Axboe, (Exiting) Baolin Wang, Bean Huo (beanhuo),
Arnd Bergmann, Veerabhadrarao Badiganti,
彭浩(Richard),
Chaotian Jing, Avri Altman, linux-mmc, Linux Kernel Mailing List,
zliua, Zoltan Szubbocsev (zszubbocsev), # 4.0+
On Wed, 2 Dec 2020 at 21:23, Bean Huo <huobean@gmail.com> wrote:
>
> From: Bean Huo <beanhuo@micron.com>
>
> The CMD13 polling is only needed for the command with R1B Resp. For the
> command with R1 Resp, such as open-ended multiple block read/write
> (CMD18/25) commands, the device will just wait for its next paired command.
> There is no need to poll device status through CMD13.
>
> Meanwhile, based on the original change commit (mmc: block: Add CMD13 polling
> for MMC IOCTLS with R1B response), and comment in __mmc_blk_ioctl_cmd(),
> current code is not in line with its original purpose. So fix it with this patch.
>
> Fixes: a0d4c7eb71dd ("mmc: block: Add CMD13 polling for MMC IOCTLS with R1B response")
> Cc: stable@vger.kernel.org
> Reported-by: Zhan Liu <zliua@micron.com>
> Signed-off-by: Zhan Liu <zliua@micron.com>
> Signed-off-by: Bean Huo <beanhuo@micron.com>
Applied for fixes, thanks!
Note, I took the liberty to rephrase the commit message (and the
header) to clarify things a bit more.
Kind regards
Uffe
> ---
> drivers/mmc/core/block.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/mmc/core/block.c b/drivers/mmc/core/block.c
> index 8d3df0be0355..42e27a298218 100644
> --- a/drivers/mmc/core/block.c
> +++ b/drivers/mmc/core/block.c
> @@ -580,7 +580,7 @@ static int __mmc_blk_ioctl_cmd(struct mmc_card *card, struct mmc_blk_data *md,
>
> memcpy(&(idata->ic.response), cmd.resp, sizeof(cmd.resp));
>
> - if (idata->rpmb || (cmd.flags & MMC_RSP_R1B)) {
> + if (idata->rpmb || (cmd.flags & MMC_RSP_R1B) == MMC_RSP_R1B) {
> /*
> * Ensure RPMB/R1B command has completed by polling CMD13
> * "Send Status".
> --
> 2.17.1
>
^ permalink raw reply [flat|nested] 3+ messages in thread* Re: [PATCH] mmc: block: Let CMD13 polling only for MMC IOCTLS with the R1B response
2020-12-04 14:38 ` Ulf Hansson
@ 2020-12-04 15:54 ` Bean Huo
0 siblings, 0 replies; 3+ messages in thread
From: Bean Huo @ 2020-12-04 15:54 UTC (permalink / raw)
To: Ulf Hansson
Cc: Jens Axboe, (Exiting) Baolin Wang, Bean Huo (beanhuo),
Arnd Bergmann, Veerabhadrarao Badiganti,
彭浩(Richard),
Chaotian Jing, Avri Altman, linux-mmc, Linux Kernel Mailing List,
zliua, Zoltan Szubbocsev (zszubbocsev), # 4.0+
On Fri, 2020-12-04 at 15:38 +0100, Ulf Hansson wrote:
> > There is no need to poll device status through CMD13.
> >
> > Meanwhile, based on the original change commit (mmc: block: Add
> > CMD13 polling
> > for MMC IOCTLS with R1B response), and comment in
> > __mmc_blk_ioctl_cmd(),
> > current code is not in line with its original purpose. So fix it
> > with this patch.
> >
> > Fixes: a0d4c7eb71dd ("mmc: block: Add CMD13 polling for MMC IOCTLS
> > with R1B response")
> > Cc: stable@vger.kernel.org
> > Reported-by: Zhan Liu <zliua@micron.com>
> > Signed-off-by: Zhan Liu <zliua@micron.com>
> > Signed-off-by: Bean Huo <beanhuo@micron.com>
>
> Applied for fixes, thanks!
>
> Note, I took the liberty to rephrase the commit message (and the
> header) to clarify things a bit more.
>
Uffe,
Nice, thanks a lot.
Bean
^ permalink raw reply [flat|nested] 3+ messages in thread
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2020-12-02 20:23 [PATCH] mmc: block: Let CMD13 polling only for MMC IOCTLS with the R1B response Bean Huo
2020-12-04 14:38 ` Ulf Hansson
2020-12-04 15:54 ` Bean Huo
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