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| author | Alex Deymo <deymo@google.com> | 2017-04-02 01:24:34 -0700 |
|---|---|---|
| committer | Jaehoon Chung <jh80.chung@samsung.com> | 2017-04-14 15:23:14 +0900 |
| commit | 7dde50d70787eb2faeced82d0c025762b12363ea (patch) | |
| tree | 317c0770a9ef1b25f1f9ddac143a40d93d08f0e5 /drivers/mmc/mmc_write.c | |
| parent | 4db2b61fcf206cb45753cd1f988a9b0aad92b561 (diff) | |
mmc: sdhci: Wait for SDHCI_INT_DATA_END when transferring.
sdhci_transfer_data() function transfers the blocks passed up to the
number of blocks defined in mmc_data, but returns immediately once all
the blocks are transferred, even if the loop exit condition is not met
(bit SDHCI_INT_DATA_END set in the STATUS word).
When doing multiple writes to mmc, returning right after the last block
is transferred can cause the write to fail when sending the
MMC_CMD_STOP_TRANSMISSION command right after the
MMC_CMD_WRITE_MULTIPLE_BLOCK command, leaving the mmc driver in an
unconsistent state until reboot. This error was observed in the rpi3
board.
This patch waits for the SDHCI_INT_DATA_END bit to be set even after
sending all the blocks.
Test: Reliably wrote 2GiB of data to mmc in a rpi3.
Signed-off-by: Alex Deymo <deymo@google.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'drivers/mmc/mmc_write.c')
0 files changed, 0 insertions, 0 deletions