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usb_storage.c

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  • Forked from Reform / reform-boundary-uboot
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    • Stefan Herbrechtsmeier's avatar
      1b4bd0e6
      usb_storage: fix ehci driver max transfer size · 1b4bd0e6
      Stefan Herbrechtsmeier authored
      
      The commit 5dd95cf9 '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: default avatarStefan Herbrechtsmeier <stefan@herbrechtsmeier.net>
      1b4bd0e6
      History
      usb_storage: fix ehci driver max transfer size
      Stefan Herbrechtsmeier authored
      
      The commit 5dd95cf9 '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: default avatarStefan Herbrechtsmeier <stefan@herbrechtsmeier.net>