Paul Zimmerman
cbc0238c26
xhci: Fix an error in count_sg_trbs_needed()
...
commit bcd2fde053 upstream.
The expression
while (running_total < sg_dma_len(sg))
does not take into account that the remaining data length can be less
than sg_dma_len(sg). In that case, running_total can end up being
greater than the total data length, so an extra TRB is counted.
Changing the expression to
while (running_total < sg_dma_len(sg) && running_total < temp)
fixes that.
This patch should be queued for stable kernels back to 2.6.31.
Signed-off-by: Paul Zimmerman <paulz@synopsys.com >
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com >
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de >
2011-03-02 09:47:07 -05:00
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