Hi Chase, On Thu, Mar 01 2012, Chase Maupin wrote: > * With certain SD cards timeouts like the following have been seen > due to an improper calculation of the dto value: > mmcblk0: error -110 transferring data, sector 4126233, nr 8, > card status 0xc00 > * By removing the dto calculation and setting the timeout value > to the maximum specified by the SD card specification part A2 > section 2.2.15 these timeouts can be avoided. > * This change has been used by beagleboard users as well as the > Texas Instruments SDK without a negative impact. > * There are multiple discussion threads about this but the most > relevant ones are: > * http://talk.maemo.org/showthread.php?p=1000707#post1000707 > * http://www.mail-archive.com/linux-omap@xxxxxxxxxxxxxxx/msg42213.html > * Original proposal for this fix was done by Sukumar Ghoral of > Texas Instruments > > * Tested using a Texas Instruments AM335x EVM > > Signed-off-by: Chase Maupin <Chase.Maupin@xxxxxx> Thanks, I've pushed this to mmc-next for 3.4. (With a trivial indentation fix, below.) diff --git a/drivers/mmc/host/omap_hsmmc.c b/drivers/mmc/host/omap_hsmmc.c index 82b400793..9d4ce1c 100644 --- a/drivers/mmc/host/omap_hsmmc.c +++ b/drivers/mmc/host/omap_hsmmc.c @@ -1360,7 +1360,7 @@ static void set_data_timeout(struct omap_hsmmc_host *host) if (clkd == 0) clkd = 1; - /* Use the maximum timeout value allowed in the standard of 14 or 0xE */ + /* Use the maximum timeout value allowed in the standard of 14 or 0xE */ dto = 14; reg &= ~DTO_MASK; - Chris. -- Chris Ball <cjb@xxxxxxxxxx> <http://printf.net/> One Laptop Per Child -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
