Al Cooper 7ce45e9506 mmc: sdhci: SD tuning is broken for some controllers ... The SD Host Controller spec states that the SD Host Controller can request that the driver send up to 40 CMD19's while doing tuning and that the total time the card spends responding must be < 150ms. The sdhci_execute_tuning() function in sdhci.c that loops through sending the CMD19's has multiple bugs. First it sets a "timeout" variable to 150 and a loop counter variable to 40. It then decrements both variables by 1 at the end of each loop. It tries to handle violations of the count and time by doing a break when BOTH variables are equal to zero, which can never happen because they we set to different values and decremented by 1 at the same time. The timeout variable is not based on time at all and is totally useless. The routine also considers a loop counter of zero to be an error which means that any controller that requests the max of 40 CMD19s will cause tuning to fail and be disabled. I've fixed these issues by allowing up to 40 CMD19's and I've removed any attempt to handle the 150ms time limit. Removing timeout checking seems safe here because each CMD19 is timeout protected and the max loop counters insures we don't loop forever. Adding timeout checking would not be as simple as snapping the time at the loop start and checking for 150ms to pass because the loop queues the CMD19's and uses events to wait for completion so the time would include all the normal scheduler latencies. Signed-off-by: Al Cooper <alcooperx@gmail.com> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> Signed-off-by: Chris Ball <chris@printf.net>		2014-05-22 08:40:46 -04:00
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accessibility	…
acpi	Merge branch 'acpi-config'	2014-04-08 21:34:51 +02:00
amba	ARM: SoC: driver changes	2014-04-05 15:37:40 -07:00
ata	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2014-04-02 16:23:38 -07:00
atm	…
auxdisplay	…
base	drivers/base/dd.c incorrect pr_debug() parameters	2014-04-16 19:34:46 -07:00
bcma	bcma: gpio: register 32 GPIOs on BCM5357	2014-03-27 14:20:04 -04:00
block	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2014-04-12 14:49:50 -07:00
bluetooth	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next	2014-04-02 20:53:45 -07:00
bus	ARM: SoC: driver changes	2014-04-05 15:37:40 -07:00
cdrom	…
char	TTY/Serial driver fixes for 3.15-rc2	2014-04-18 16:57:53 -07:00
clk	== Changes to existing drivers ==	2014-04-07 10:24:18 -07:00
clocksource	CPU hotplug notifiers registration fixes for 3.15-rc1	2014-04-07 14:55:46 -07:00
connector	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next	2014-04-02 20:53:45 -07:00
cpufreq	Merge branch 'pm-cpufreq'	2014-04-08 13:28:02 +02:00
cpuidle	Merge branch 'pm-cpuidle'	2014-04-08 13:27:40 +02:00
crypto	Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6	2014-04-03 09:28:16 -07:00
dca	…
devfreq	…
dio	…
dma	dma: fix eDMA driver as a subsys_initcall	2014-04-16 12:03:47 +05:30
edac	Merge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media	2014-04-04 09:50:07 -07:00
eisa	…
extcon	…
firewire	…
firmware	Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2014-04-11 11:58:33 -07:00
fmc	…
gpio	Shiraz has moved	2014-04-18 16:40:08 -07:00
gpu	Merge branch 'drm-next-3.15-wip' of git://people.freedesktop.org/~deathsimple/linux into drm-next	2014-04-19 11:16:02 +10:00
hid	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid	2014-04-18 10:31:34 -07:00
hsi	…
hv	Drivers: hv: vmbus: Negotiate version 3.0 when running on ws2012r2 hosts	2014-04-16 14:14:07 -07:00
hwmon	Merge branch 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc	2014-04-09 08:35:31 -07:00
hwspinlock	…
i2c	Merge branch 'i2c/for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux	2014-04-09 08:45:40 -07:00
ide	…
idle	Merge branch 'pm-cpuidle'	2014-04-08 13:27:40 +02:00
iio	== Changes to existing drivers ==	2014-04-07 10:24:18 -07:00
infiniband	InfiniBand/RDMA updates for 3.15-rc2:	2014-04-18 13:49:42 -07:00
input	pwm: Changes for v3.15-rc1	2014-04-05 18:32:31 -07:00
iommu	Merge git://git.infradead.org/iommu-2.6 into iommu/fixes	2014-04-16 16:09:40 +02:00
ipack	…
irqchip	Shiraz has moved	2014-04-18 16:40:08 -07:00
isdn	isdn: icn: buffer overflow in icn_command()	2014-04-16 15:24:15 -04:00
leds	Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/linux-leds	2014-04-10 09:06:10 -07:00
lguest	drivers/lguest/page_tables.c: rename do_set_pte()	2014-04-07 16:35:52 -07:00
macintosh	…
mailbox	…
mcb	drivers: mcb: fix memory leak in chameleon_parse_cells() error path	2014-04-16 12:28:47 -07:00
md	One BUG fix for md for recent commit	2014-04-17 10:51:01 -07:00
media	platform: Fix timberdale dependencies	2014-04-16 11:57:27 +05:30
memory	…
memstick	…
message	PCI changes for the v3.15 merge window:	2014-04-01 15:14:04 -07:00
mfd	MMC highlights for 3.15:	2014-04-09 08:39:39 -07:00
misc	misc: Grammar s/addition/additional/	2014-04-16 12:28:47 -07:00
mmc	mmc: sdhci: SD tuning is broken for some controllers	2014-05-22 08:40:46 -04:00
mtd	Shiraz has moved	2014-04-18 16:40:08 -07:00
net	mmc: drop the speed mode of card's state	2014-05-12 18:05:53 -04:00
nfc	…
ntb	ntb: Use pci_enable_msix_range() instead of pci_enable_msix()	2014-04-07 10:59:20 -07:00
nubus	…
of	of: Clean up of_update_property	2014-04-15 15:21:22 -05:00
oprofile	…
parisc	…
parport	…
pci	PCI: tegra: Use new OF interrupt mapping when possible	2014-04-16 10:24:32 -06:00
pcmcia	PCI changes for the v3.15 merge window:	2014-04-01 15:14:04 -07:00
phy	ARM: SoC: driver changes	2014-04-05 15:37:40 -07:00
pinctrl	pinctrl: Rename Broadcom Capri pinctrl driver	2014-04-14 09:39:33 +02:00
platform	alienware-wmi: cover some scenarios where memory allocations would fail	2014-04-10 12:11:56 -04:00
pnp	More ACPI and power management updates for 3.15-rc1	2014-04-02 14:10:21 -07:00
power	…
powercap	CPU hotplug notifiers registration fixes for 3.15-rc1	2014-04-07 14:55:46 -07:00
pps	…
ps3	…
ptp	net: ptp: move PTP classifier in its own file	2014-04-01 16:43:18 -04:00
pwm	Shiraz has moved	2014-04-18 16:40:08 -07:00
rapidio	rapidio: rework device hierarchy and introduce mport class of devices	2014-04-07 16:36:07 -07:00
regulator	regulator: Fixes for v3.15	2014-04-11 13:30:05 -07:00
remoteproc	…
reset	Merge branch 'reset/for_v3.15' of git://git.pengutronix.de/git/pza/linux into next/drivers	2014-03-27 01:28:19 +01:00
rpmsg	…
rtc	ARM: SoC: driver changes	2014-04-05 15:37:40 -07:00
s390	s390/sclp_cmd: replace PTR_RET with PTR_ERR_OR_ZERO	2014-04-11 13:53:42 +02:00
sbus	…
scsi	sym53c8xx_2: Set DID_REQUEUE return code when aborting squeue	2014-04-12 18:02:16 -07:00
sfi	…
sh	ARM: SoC: sh driver changes	2014-04-05 15:38:41 -07:00
sn	…
spi	spi: Fixes for v3.15	2014-04-11 13:35:49 -07:00
spmi	…
ssb	…
staging	staging driver fixes for 3.15-rc2	2014-04-18 16:58:47 -07:00
target	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2014-04-12 17:31:22 -07:00
tc	…
thermal	Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux	2014-04-10 09:15:46 -07:00
tty	Revert "serial: 8250, disable "too much work" messages"	2014-04-17 09:33:19 -07:00
uio	…
usb	uas: fix deadlocky memory allocations	2014-04-16 14:04:59 -07:00
uwb	uwb: adds missing error handling	2014-04-16 14:03:40 -07:00
vfio	VFIO updates for v3.15 include:	2014-04-03 14:05:02 -07:00
vhost	Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending	2014-04-12 16:51:08 -07:00
video	video: Kconfig: move drm and fb into separate menus	2014-04-17 08:10:20 +03:00
virt	…
virtio	…
vlynq	…
vme	vme_tsi148: Utilize to_pci_dev() macro	2014-04-16 14:08:37 -07:00
w1	w1: avoid recursive device_add	2014-04-16 14:07:51 -07:00
watchdog	CPU hotplug notifiers registration fixes for 3.15-rc1	2014-04-07 14:55:46 -07:00
xen	Xen regression and bug fixes for 3.15-rc1.	2014-04-17 10:54:07 -07:00
zorro	…
Kconfig	…
Makefile	video: move fbdev to drivers/video/fbdev	2014-04-17 08:10:19 +03:00