[PATCH 021/222] xhci: Fix conditional check in bandwidth calculation.

From: Herton Ronaldo Krzesinski
Date: Wed Jan 16 2013 - 12:12:34 EST


3.5.7.3 -stable review patch. If anyone has any objections, please let me know.

------------------

From: Sarah Sharp <sarah.a.sharp@xxxxxxxxxxxxxxx>

commit 392a07ae3316f2b90b39ce41e66d6f6b5c95de90 upstream.

David reports that at drivers/usb/host/xhci.c:2257:

static bool xhci_is_sync_in_ep(unsigned int ep_type)
{
return (ep_type == ISOC_IN_EP || ep_type != INT_IN_EP);
}

The static analyser cppcheck says

[linux-3.7-rc2/drivers/usb/host/xhci.c:2257]: (style) Redundant condition: If ep_type == 5, the comparison ep_type != 7 is always true.

Maybe the original programmer intention was something like

static bool xhci_is_sync_in_ep(unsigned int ep_type)
{
return (ep_type == ISOC_IN_EP || ep_type == INT_IN_EP);
}

Fix this.

This patch should be backported to stable kernels as old as 3.2, that
contain the commit 2b69899934c63b7b9432568584fb4c4a2924f40c "xhci: USB
3.0 BW checking."

Signed-off-by: Sarah Sharp <sarah.a.sharp@xxxxxxxxxxxxxxx>
Reported-by: David Binderman <dcb314@xxxxxxxxxxx>
Signed-off-by: Herton Ronaldo Krzesinski <herton.krzesinski@xxxxxxxxxxxxx>
---
drivers/usb/host/xhci.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c
index 5f831c2..f67634b 100644
--- a/drivers/usb/host/xhci.c
+++ b/drivers/usb/host/xhci.c
@@ -2253,7 +2253,7 @@ static bool xhci_is_async_ep(unsigned int ep_type)

static bool xhci_is_sync_in_ep(unsigned int ep_type)
{
- return (ep_type == ISOC_IN_EP || ep_type != INT_IN_EP);
+ return (ep_type == ISOC_IN_EP || ep_type == INT_IN_EP);
}

static unsigned int xhci_get_ss_bw_consumed(struct xhci_bw_info *ep_bw)
--
1.7.9.5

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