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authorEric Sesterhenn <snakebyte@gmx.de>2006-06-01 20:48:45 -0700
committerGreg Kroah-Hartman <gregkh@suse.de>2006-06-21 15:04:15 -0700
commitd5ce1379be9c79d4bcf201c20c5cc87bb2bc973c (patch)
tree35920fe3fd457b4a472dfa999b76393637d2d544 /drivers/usb/host/isp116x-hcd.c
parentb10cee9d035db54d0bf5a9f9fa622dcfc3f740c6 (diff)
downloadlinux-d5ce1379be9c79d4bcf201c20c5cc87bb2bc973c.tar.bz2
[PATCH] USB: negative index in drivers/usb/host/isp116x-hcd.c
From: Eric Sesterhenn <snakebyte@gmx.de> This fixes coverity Bug #390. With the following code ret = ep->branch = balance(isp116x, ep->period, ep->load); if (ret < 0) goto fail; the problem is that ret and balance are of the type int, and ep->branch is u16. so the int balance() returns gets reduced to u16 and then converted to an int again, which removes the sign. Maybe the following little c program can explain it better:
Diffstat (limited to 'drivers/usb/host/isp116x-hcd.c')
-rw-r--r--drivers/usb/host/isp116x-hcd.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/usb/host/isp116x-hcd.c b/drivers/usb/host/isp116x-hcd.c
index e99210b7909b..c5e224048efa 100644
--- a/drivers/usb/host/isp116x-hcd.c
+++ b/drivers/usb/host/isp116x-hcd.c
@@ -781,7 +781,7 @@ static int isp116x_urb_enqueue(struct usb_hcd *hcd,
if (ep->branch < PERIODIC_SIZE)
break;
- ret = ep->branch = balance(isp116x, ep->period, ep->load);
+ ep->branch = ret = balance(isp116x, ep->period, ep->load);
if (ret < 0)
goto fail;
ret = 0;