mmc: sdhci: Avoid swiotlb buffer being full

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commit 250dcd1146 upstream.

The commit de3ee99b09 ("mmc: Delete bounce buffer handling") deletes the
bounce buffer handling, but also causes the max_req_size for sdhci to be
increased, in case when max_segs == 1. This causes errors for sdhci-pci
Ricoh variant, about the swiotlb buffer to become full.

Fix the issue, by taking IO_TLB_SEGSIZE and IO_TLB_SHIFT into account when
deciding the max_req_size for sdhci.

Reported-by: Jiri Slaby <jslaby@suse.cz>
Fixes: de3ee99b09 ("mmc: Delete bounce buffer handling")
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Tested-by: Jiri Slaby <jslaby@suse.cz>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

This commit is contained in:

Ulf Hansson 2017-11-27 11:28:50 +01:00 • committed by Greg Kroah-Hartman

parent 81b3019c35

commit 4162b2973c

1 changed files with 18 additions and 10 deletions

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drivers/mmc/host/sdhci.c

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