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linux-sg2042
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USB: don't try to kzalloc 0 bytes 

This patch (as907) prevents us from trying to allocate 0 bytes
when an interface has no endpoint descriptors.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Alan Stern 2007-05-15 17:40:37 -04:00 committed by Greg Kroah-Hartman
parent b89ee19ae6
commit 57a21c1b92
1 changed files with 6 additions and 4 deletions
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2
drivers/usb/core/config.c
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@ -185,10 +185,12 @@ static int usb_parse_interface(struct device *ddev, int cfgno,
num_ep = USB_MAXENDPOINTS; num_ep = USB_MAXENDPOINTS;
} }
if (num_ep > 0) { /* Can't allocate 0 bytes */
len = sizeof(struct usb_host_endpoint) * num_ep; len = sizeof(struct usb_host_endpoint) * num_ep;
alt->endpoint = kzalloc(len, GFP_KERNEL); alt->endpoint = kzalloc(len, GFP_KERNEL);
if (!alt->endpoint) if (!alt->endpoint)
return -ENOMEM; return -ENOMEM;
}
/* Parse all the endpoint descriptors */ /* Parse all the endpoint descriptors */
n = 0; n = 0;