Will Deacon 8f7f6b7e46 mmc: mmci: reduce max_blk_count to avoid overflowing max_req_size ... On a system with large pages (64k in my case), the following BUG is triggered in MMC core: [ 2.338023] BUG: failure at drivers/mmc/core/core.c:221/mmc_start_request()! [ 2.338102] Kernel panic - not syncing: BUG! [ 2.338155] Call trace: [ 2.338228] [<ffffffc00008635c>] dump_backtrace+0x0/0x120 [ 2.338317] [<ffffffc0003365ec>] dump_stack+0x14/0x1c [ 2.338403] [<ffffffc000336990>] panic+0xbc/0x1f0 [ 2.338498] [<ffffffc00027a494>] mmc_start_request+0x154/0x184 [ 2.338600] [<ffffffc00027abdc>] mmc_start_req+0x110/0x140 [ 2.338701] [<ffffffc00028604c>] mmc_blk_issue_rw_rq+0x7c/0x39c [ 2.338804] [<ffffffc00028652c>] mmc_blk_issue_rq+0x1c0/0x468 [ 2.338905] [<ffffffc000287564>] mmc_queue_thread+0x68/0x118 [ 2.338995] [<ffffffc0000bc308>] kthread+0x84/0x8c This is because of a 64k request with a max_req_size of 64k-1 bytes. The following patch fixes the problem by limiting the max_blk_count such that max_blk_count * max_blk_size == max_req_size. I couldn't pursuade the compiler to emit a shift instead of a div without encoding the shift explicitly. Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Chris Ball <cjb@laptop.org>		2012-03-04 12:25:14 -05:00
..
at91_mci.c
at91_mci.h
atmel-mci-regs.h
atmel-mci.c	mmc: atmel-mci: don't use dma features when using DMA with no chan available	2012-03-02 16:06:40 -05:00
au1xmmc.c
bfin_sdh.c
cb710-mmc.c
cb710-mmc.h
davinci_mmc.c
dw_mmc.c	mmc: dw_mmc: Fix PIO mode with support of highmem	2012-02-13 20:39:05 -05:00
dw_mmc.h
imxmmc.c
imxmmc.h
jz4740_mmc.c
Kconfig
Makefile
mmc_spi.c
mmci.c	mmc: mmci: reduce max_blk_count to avoid overflowing max_req_size	2012-03-04 12:25:14 -05:00
mmci.h
msm_sdcc.c
msm_sdcc.h
mvsdio.c
mvsdio.h
mxcmmc.c
mxs-mmc.c
of_mmc_spi.c	mmc: of_mmc_spi: fix little endian support	2012-02-13 20:38:58 -05:00
omap.c
omap_hsmmc.c
pxamci.c
pxamci.h
s3cmci.c
s3cmci.h
sdhci-cns3xxx.c
sdhci-dove.c
sdhci-esdhc-imx.c	mmc: sdhci-esdhc-imx: fix for mmc cards on i.MX5	2012-03-04 12:25:02 -05:00
sdhci-esdhc.h
sdhci-of-esdhc.c	mmc: esdhc: fix errors when booting kernel on Freescale eSDHC version 2.3	2012-02-12 00:24:24 -05:00
sdhci-of-hlwd.c
sdhci-pci-data.c
sdhci-pci.c	mmc: sdhci-pci: set Medfield SDIO as non-removable	2012-02-13 20:39:01 -05:00
sdhci-pltfm.c	mmc: esdhc: set the timeout to the max value	2012-02-13 20:38:59 -05:00
sdhci-pltfm.h
sdhci-pxav2.c
sdhci-pxav3.c
sdhci-s3c.c
sdhci-spear.c
sdhci-tegra.c
sdhci.c
sdhci.h
sdricoh_cs.c
sh_mmcif.c	mmc: sh_mmcif: fix late delayed work initialisation	2012-02-13 20:39:03 -05:00
sh_mobile_sdhi.c
tifm_sd.c
tmio_mmc.c
tmio_mmc.h	mmc: tmio_mmc: fix card eject during IO with DMA	2012-02-13 20:39:03 -05:00
tmio_mmc_dma.c	mmc: tmio_mmc: fix card eject during IO with DMA	2012-02-13 20:39:03 -05:00
tmio_mmc_pio.c	mmc: tmio_mmc: fix card eject during IO with DMA	2012-02-13 20:39:03 -05:00
ushc.c
via-sdmmc.c
vub300.c
wbsd.c
wbsd.h