Thread (35 messages) 35 messages, 7 authors, 2015-02-25

[PATCH v4 0/3] about data busy

From: dianders@chromium.org (Doug Anderson)
Date: 2015-02-20 19:03:58
Also in: linux-mmc, lkml

Hi,

On Fri, Feb 13, 2015 at 10:17 PM, Addy Ke [off-list ref] wrote:
patch 1: This patch can fix bug that controller is still data busy after
         reset all blocks. After this patch, I still get data busy in
         set_ios().

patch 2: This patch fix bug 'Timeout sending command'. After patch1 and
         patch2, there is no mmc errors after:
         cd /sys/bus/platform/drivers/dwmmc_rockchip
         for i in $(seq 1 10000); do
                echo "========================" $i
                echo ff0c0000.dwmmc > unbind
                sleep .5
                echo ff0c0000.dwmmc > bind
                sleep 2
        done

patch3: This patch fix bug that there is data busy before sdio send CMD53.
        But This patch is necessary for sd and mmc too.

Addy Ke (3):
  mmc: dw_mmc: update clock after host reach a stable voltage
  mmc: dw_mmc: fix bug that cause 'Timeout sending command'
  mmc: dw_mmc: Don't start command while data busy

 drivers/mmc/host/dw_mmc.c | 41 ++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 40 insertions(+), 1 deletion(-)
A little hard to follow all the patches flying around (so I'll
probably reply a few different places with the same info), but I
believe that all of Addy's patches (with the exception of the one
intended to fix mmc_test which needs to be spun by him for a bugfix)
can be replaced with:

* mmc: dw_mmc: Don't start commands while busy
  https://patchwork.kernel.org/patch/5858221/

* mmc: dw_mmc: Make sure we only adjust the clock when power is on
  https://patchwork.kernel.org/patch/5858261/

* mmc: dw_mmc: Give a good reset after we give power
  https://patchwork.kernel.org/patch/5858281/


In order to avoid further spreading info out among several patches,
I'd request that you don't respond here but instead respond to my
posted patches.  Thanks!

-Doug
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