From: John Youn <John.Youn@synopsys.com>
Date: Mon, 9 Aug 2010 20:56:11 +0000 (-0700)
Subject: USB: xhci: Remove buggy assignment in next_trb()
X-Git-Tag: v2.6.36-rc3~41^2~5
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a1669b2c64a9c8b031e0ac5cbf2692337a577f7c;p=pandora-kernel.git

USB: xhci: Remove buggy assignment in next_trb()

The code to increment the TRB pointer has a slight ambiguity that could
lead to a bug on different compilers.  The ANSI C specification does not
specify the precedence of the assignment operator over the postfix
operator.  gcc 4.4 produced the correct code (increment the pointer and
assign the value), but a MIPS compiler that one of John's clients used
assigned the old (unincremented) value.

Remove the unnecessary assignment to make all compilers produce the
correct assembly.

Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Cc: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---

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