https://github.com/torvalds/linux
Revision d380443cd0271903bf9516bc04cead81676be034 authored by Subhash Jadavani on 13 June 2012, 11:40:43 UTC, committed by Chris Ball on 26 June 2012, 20:10:29 UTC
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>
1 parent d1346a6
Tip revision: d380443cd0271903bf9516bc04cead81676be034 authored by Subhash Jadavani on 13 June 2012, 11:40:43 UTC
mmc: block: fix the data timeout issue with ACMD22
mmc: block: fix the data timeout issue with ACMD22
Tip revision: d380443
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| crypto | ||
| drivers | ||
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| fs | ||
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| init | ||
| ipc | ||
| kernel | ||
| lib | ||
| mm | ||
| net | ||
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| .gitignore | -rw-r--r-- | 1014 bytes |
| .mailmap | -rw-r--r-- | 4.4 KB |
| COPYING | -rw-r--r-- | 18.3 KB |
| CREDITS | -rw-r--r-- | 92.7 KB |
| Kbuild | -rw-r--r-- | 2.5 KB |
| Kconfig | -rw-r--r-- | 252 bytes |
| MAINTAINERS | -rw-r--r-- | 208.2 KB |
| Makefile | -rw-r--r-- | 46.0 KB |
| README | -rw-r--r-- | 17.3 KB |
| REPORTING-BUGS | -rw-r--r-- | 3.3 KB |
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