| commit | ada18da8c7cdda4af8d622c31acd6b1ee31ba7c3 | |
| author | Phil Elwell <phil@raspberrypi.org> | |
| Sun, 11 Nov 2018 20:23:54 +0000 (11 21:23 +0100) | ||
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | |
| Tue, 12 Feb 2019 19:02:20 +0000 (12 20:02 +0100) | ||
| tree | a8237293448fc478dac822a16a67432cae2d40f2 | treesnapshot (tar.gz zip) |
| parent | bc97a60d576c2b9e4b7af24f250e1f29731b1828 | commitdiff |
mmc: bcm2835: Recover from MMC_SEND_EXT_CSD
[ Upstream commit 07d405769afea5718529fc9e341f0b13b3189b6f ]
If the user issues an "mmc extcsd read", the SD controller receives
what it thinks is a SEND_IF_COND command with an unexpected data block.
The resulting operations leave the FSM stuck in READWAIT, a state which
persists until the MMC framework resets the controller, by which point
the root filesystem is likely to have been unmounted.
A less heavyweight solution is to detect the condition and nudge the
FSM by asserting the (self-clearing) FORCE_DATA_MODE bit.
Link: https://github.com/raspberrypi/linux/issues/2728
Signed-off-by: Phil Elwell <phil@raspberrypi.org>
Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Acked-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
[ Upstream commit 07d405769afea5718529fc9e341f0b13b3189b6f ]
If the user issues an "mmc extcsd read", the SD controller receives
what it thinks is a SEND_IF_COND command with an unexpected data block.
The resulting operations leave the FSM stuck in READWAIT, a state which
persists until the MMC framework resets the controller, by which point
the root filesystem is likely to have been unmounted.
A less heavyweight solution is to detect the condition and nudge the
FSM by asserting the (self-clearing) FORCE_DATA_MODE bit.
Link: https://github.com/raspberrypi/linux/issues/2728
Signed-off-by: Phil Elwell <phil@raspberrypi.org>
Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Acked-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| drivers/mmc/host/bcm2835.c | diffblobblamehistory |