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3bdc9ba892
Several people have noticed that crappy SD cards take much longer to complete multiple block writes than the 300ms that Linux specifies. Try to work around this by using a three second write timeout instead. This is a generalized version of a patch from Chase Maupin <[email protected]>, whose patch description said: * 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/[email protected]/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: Paul Walmsley <[email protected]> Tested-by: Tony Lindgren <[email protected]> Signed-off-by: Chris Ball <[email protected]> |
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