• Alan Stern's avatar
    [PATCH] USB storage: Fix scatter-gather buffer access in usb-storage core · f3badfb7
    Alan Stern authored
    This patch adds a routine to protocol.c that correctly transfers data to
    or from a scatter-gather buffer.  According to Jens Axboe, we've been
    using page_address() incorrectly -- it's necessary to use kmap() instead
    -- and in fact it doesn't give the desired result when the buffers are
    located in high memory.  This could affect anyone using a system with 1 GB
    or more of RAM, and one user has already reported such a problem (as you
    know).
    
    The three fixup routines in protocol.c and usb.c have been changed to use
    the new s-g access routine.  When similar adjustments have been made to
    all the subdrivers, we will be able to eliminate the raw_bulk.c source
    file entirely.
    f3badfb7
protocol.c 8.33 KB