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authorKyle Moffett <Kyle.D.Moffett@boeing.com>2011-12-21 07:08:12 +0000
committerWolfgang Denk <wd@denx.de>2012-01-05 20:10:38 +0100
commit5dd95cf93dfffa1d19a1928990852aac9f55b9d9 (patch)
tree0c9b07b340e7ac07ea2eb0d151744bd4d05fef4c /fs/fat
parent46236b1407946aaed319551357703d487f82572e (diff)
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usb_storage: Fix EHCI "out of buffer pointers" with CD-ROM
When performing large bulk reads from a CD or DVD using the U-Boot usb_storage driver, it generates requests of up to 20 blocks at a time. With a standard 512-byte block size, that is 10240 bytes and within the limit of U-Boot's EHCI driver (maximum 5 pages at 4k per page). Unfortunately CD-ROM media has a 2048-byte blocksize, resulting in a maximum transfer size of 40960 bytes, which does not fit. Since the EHCI specification is impossibly obtuse and far beyond my comprehension, I chose to dynamically compute the limit based on the blocksize. Signed-off-by: Kyle Moffett <Kyle.D.Moffett@boeing.com>
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