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| author | John Youn <John.Youn@synopsys.com> | 2010-08-09 13:56:11 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2010-08-23 20:50:16 -0700 |
| commit | a1669b2c64a9c8b031e0ac5cbf2692337a577f7c (patch) | |
| tree | 4224d7050c9b317c6d18074c678d590b82740236 /drivers/usb | |
| parent | 666cc076d284e32d11bfc5ea2fbfc50434cff051 (diff) | |
| download | blackbird-op-linux-a1669b2c64a9c8b031e0ac5cbf2692337a577f7c.tar.gz blackbird-op-linux-a1669b2c64a9c8b031e0ac5cbf2692337a577f7c.zip | |
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>
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/host/xhci-ring.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c index bc3f4f427065..2f19f3a817c2 100644 --- a/drivers/usb/host/xhci-ring.c +++ b/drivers/usb/host/xhci-ring.c @@ -131,7 +131,7 @@ static void next_trb(struct xhci_hcd *xhci, *seg = (*seg)->next; *trb = ((*seg)->trbs); } else { - *trb = (*trb)++; + (*trb)++; } } |
