[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