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usb: usbfs: only account once for mmap()'ed usb memory usage

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Memory usage for USB memory allocated via mmap() is already accounted
for at mmap() time; no need to account for it again at submiturb time.

Signed-off-by: Gavin Li <git@thegavinli.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Link: https://lore.kernel.org/r/20190814212924.10381-1-gavinli@thegavinli.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Gavin Li 2019-08-14 14:29:24 -07:00 committed by Greg Kroah-Hartman
parent a599e48662
commit b08a6259a1
1 changed files with 2 additions and 1 deletions
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3
drivers/usb/core/devio.c
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@ -1664,7 +1664,8 @@ static int proc_do_submiturb(struct usb_dev_state *ps, struct usbdevfs_urb *uurb
if (as->usbm)
num_sgs = 0;
u += sizeof(struct async) + sizeof(struct urb) + uurb->buffer_length +
u += sizeof(struct async) + sizeof(struct urb) +
(as->usbm ? 0 : uurb->buffer_length) +
num_sgs * sizeof(struct scatterlist);
ret = usbfs_increase_memory_usage(u);
if (ret)