Markos Chandras cfbeb59c7a mmc: dw_mmc: Handle unaligned data submission correctly ... Commit f9c2a0dc42 "mmc: dw_mmc: Fix PIO mode with support of highmem" introduced a regression since v3.2 making the mmc_test hang on test #13 with a "Data starvation by host timeout" interrupt. This is because, sg_mapping_iter is used to iterate through the data which spans on multiple pages. The problem is detected on unaligned data submission where the code previously checked for !(sg_next(host->sg)) which is true because we only have a single scatter/gather list which then expands to multiple pages. Therefore, the driver incorrectly assumed that this was the last list item and submitted unaligned data to the mmc device. This overflowed the FIFO on the device before all the data were written to it. The code was fixed to only submit unaligned data when we are handling the last sg_miter item by checking whether we reached the desired data length or not. The patch was tested against mmc_test and all the tests passed. Signed-off-by: Markos Chandras <markos.chandras@imgtec.com> Acked-by: Jaehoon Chung <jh80.chung@samsung.com> Acked-by: Seungwon Jeon <tgih.jun@samsung.com> Signed-off-by: Chris Ball <cjb@laptop.org>		2013-03-22 12:53:49 -04:00
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card	MMC highlights for 3.9:	2013-02-26 09:31:09 -08:00
core	mmc: sdio: bind acpi with sdio function device	2013-03-22 12:26:54 -04:00
host	mmc: dw_mmc: Handle unaligned data submission correctly	2013-03-22 12:53:49 -04:00
Kconfig	mmc: explicitly mention SDIO support in Kconfig	2008-10-12 11:04:36 +02:00
Makefile	mmc: sdhci-pci: add platform data	2012-01-11 23:58:47 -05:00