Skip to content
Commit d380443c authored by Subhash Jadavani's avatar Subhash Jadavani Committed by Chris Ball
Browse files

mmc: block: fix the data timeout issue with ACMD22



If multi block write operation fails for SD card, during
error handling we send the SD_APP_SEND_NUM_WR_BLKS (ACMD22)
to know how many blocks were already programmed by card.

But mmc_sd_num_wr_blocks() function which sends the ACMD22
calculates the data timeout value from csd.tacc_ns and
csd.tacc_clks parameters which will be 0 for block addressed
(>2GB cards) SD card. This would result in timeout_ns and
timeout_clks being 0 in the mmc_request passed to host driver.
This means host controller would program its data timeout timer
value with 0 which could result in DATA TIMEOUT errors from
controller.

To fix this issue, mmc_sd_num_wr_blocks() should instead
just call the mmc_set_data_timeout() to calculate the
data timeout value. mmc_set_data_timeout() function
ensures that non zero timeout value is set even for
block addressed SD cards.

Signed-off-by: default avatarSubhash Jadavani <subhashj@codeaurora.org>
Reviewed-by: default avatarVenkatraman S <svenkatr@ti.com>
Signed-off-by: default avatarChris Ball <cjb@laptop.org>
parent d1346a6c
Loading
Loading
Loading
Loading
0% Loading or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment