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authorStefan Herbrechtsmeier <stefan@herbrechtsmeier.net>2012-07-09 09:52:29 +0000
committerMarek Vasut <marex@denx.de>2012-07-18 14:46:19 +0200
commit1b4bd0e66cd3b5124669c78bc968510b1040e9d9 (patch)
tree98ddfff50178f251f4feffb6aab11e6dd5a90bae /board/xes/xpedite517x
parente3b31c8d757011cc862d5464217276c3bf5191d5 (diff)
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usb_storage: fix ehci driver max transfer size
The commit 5dd95cf93dfffa1d19a1928990852aac9f55b9d9 'usb_storage: Fix EHCI "out of buffer pointers" with CD-ROM' introduce a bug in usb_storage as it wrongly assumes that every transfer can use 4096 bytes per qt_buffer. This is wrong if the start address of the data is not page aligned to 4096 bytes and leads to 'EHCI timed out on TD' messages because of 'out of buffer pointers' in ehci_td_buffer function. The bug appears during load of a fragmented file and read from or write to an unaligned memory address. Cc: Marek Vasut <marex@denx.de> Signed-off-by: Stefan Herbrechtsmeier <stefan@herbrechtsmeier.net>
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