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linux/include
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Adrian Hunter 0d3e3350d5 mmc: core: fix performance regression initializing MMC host controllers 
Commit fa5501890d introduced a performance
regression by adding mmc_power_up() to mmc_start_host().  mmc_power_up()
is not necessary to host controller initialization, it is part of card
initialization and is performed anyway asynchronously.

This patch allows a driver to leave the power up in asynchronous code
(as it was before).

On my current target platform this reduces driver initialization from:

[    1.313220] initcall sdhci_acpi_driver_init+0x0/0x12 returned 0 after 102008 usecs

to this:

[    1.217209] initcall sdhci_acpi_driver_init+0x0/0x12 returned 0 after 8331 usecs

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Acked-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Chris Ball <cjb@laptop.org>
2013-04-12 14:08:07 -04:00
..
acpi Merge branch 'linux_next' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-edac 2013-02-28 20:42:33 -08:00
asm-generic ImgTec Meta architecture changes for v3.9-rc1 2013-03-03 12:06:09 -08:00
clocksource ImgTec Meta architecture changes for v3.9-rc1 2013-03-03 12:06:09 -08:00
crypto
drm drm: Add HDMI infoframe helpers 2013-02-22 08:20:10 +01:00
keys
linux mmc: core: fix performance regression initializing MMC host controllers 2013-04-12 14:08:07 -04:00
math-emu
media [media] media: ov7670: Add possibility to disable pixclk during hblank 2013-02-08 14:35:06 -02:00
memory
misc
net Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2013-03-03 13:23:03 -08:00
pcmcia
ras edac: add support for error type "Info" 2013-02-21 14:16:27 -03:00
rdma IB/core: Add "type 2" memory windows support 2013-02-21 11:51:45 -08:00
rxrpc
scsi SCSI for-linus on 20130301 2013-03-02 11:42:16 -08:00
sound arm-soc: late OMAP changes 2013-02-28 20:00:40 -08:00
target target: Rename spc_get_write_same_sectors -> sbc_get_write_same_sectors 2013-02-23 12:46:14 -08:00
trace Various bug fixes for ext4. The most important is a fix for the new 2013-03-02 19:33:21 -08:00
uapi UAPI disintegration 2012-12-20 2013-03-03 14:24:59 -08:00
video UAPI disintegration 2012-12-20 2013-03-03 14:24:59 -08:00
xen xen: event channel arrays are xen_ulong_t and not unsigned long 2013-02-20 08:45:07 -05:00
Kbuild