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mmc: sdhci: avoid walking SG list for writes
authorRussell King <rmk+kernel@arm.linux.org.uk>
Tue, 26 Jan 2016 13:40:06 +0000 (13:40 +0000)
committerUlf Hansson <ulf.hansson@linaro.org>
Mon, 29 Feb 2016 10:03:19 +0000 (11:03 +0100)
commit47fa961340d2181ebf1165b7651dcbb1b1029163
tree946433cc998c70b121b2cf08a4766234ed2a90cdtree | snapshot (tar.gz zip)
parentacc3ad13832ab1aa01bdf9b7e1d76171d1e4d060commit | diff
mmc: sdhci: avoid walking SG list for writes

If we are writing data to the card, there is no point in walking the
scatterlist to find out if there are any unaligned entries; this is a
needless waste of CPU cycles.  Avoid this by checking for a non-read
tranfer first.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Tested-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
drivers/mmc/host/sdhci.c diff | blob | blame | history