linux/drivers/mmc/card
Subhash Jadavani d380443cd0 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: Subhash Jadavani <subhashj@codeaurora.org>
Reviewed-by: Venkatraman S <svenkatr@ti.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
2012-06-26 16:10:29 -04:00
..
Kconfig mmc: Improve MMC_TEST config text. 2011-03-15 13:48:56 -04:00
Makefile mmc: Makefile: Fix EXTRA_CFLAGS assignment 2010-10-23 21:11:15 +08:00
block.c mmc: block: fix the data timeout issue with ACMD22 2012-06-26 16:10:29 -04:00
mmc_test.c MMC highlights for 3.3: 2012-01-13 20:41:15 -08:00
queue.c mmc: queue: remove redundant memsets 2012-05-09 10:10:46 -04:00
queue.h mmc: block: add handling for two parallel block requests in issue_rw_rq 2011-07-20 17:21:15 -04:00
sdio_uart.c TTY: remove re-assignments to tty_driver members 2012-03-08 11:37:58 -08:00