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| author | Pan Bian <bianpan2016@163.com> | 2016-11-29 20:55:12 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-11-29 17:36:43 +0100 |
| commit | cd63a1c1952e169b788ee3ee2a064546ca325ea0 (patch) | |
| tree | ab0d6b8541211c45b8fa28fd65a3bd6c230bbe80 /drivers/usb/wusbcore/wa-xfer.c | |
| parent | fca0ca95c34dde7e735ef322c599dfa0b4a2deae (diff) | |
| download | linux-cd63a1c1952e169b788ee3ee2a064546ca325ea0.tar.gz linux-cd63a1c1952e169b788ee3ee2a064546ca325ea0.tar.bz2 linux-cd63a1c1952e169b788ee3ee2a064546ca325ea0.zip | |
usb: return correct errno on failures
In function __wa_xfer_setup_segs(), variable result takes the return
value. Its value should be a negative errno on failures. Because result
may be reassigned in a loop, and its value is guaranteed to be not less
than 0 during the following repeats of the loop. So when the call to
kmalloc() or usb_alloc_urb() fails in the loop, the value of variable
result may be 0 (indicates no error), which is inconsistent with the
execution status. This patch fixes the bug, initializing variable result
with -ENOMEM in the loop.
Signed-off-by: Pan Bian <bianpan2016@163.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/wusbcore/wa-xfer.c')
| -rw-r--r-- | drivers/usb/wusbcore/wa-xfer.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/usb/wusbcore/wa-xfer.c b/drivers/usb/wusbcore/wa-xfer.c index 167fcc71f5f6..e70322b1dd02 100644 --- a/drivers/usb/wusbcore/wa-xfer.c +++ b/drivers/usb/wusbcore/wa-xfer.c @@ -1203,6 +1203,7 @@ static int __wa_xfer_setup_segs(struct wa_xfer *xfer, size_t xfer_hdr_size) sizeof(struct wa_xfer_packet_info_hwaiso) + (seg_isoc_frame_count * sizeof(__le16)); } + result = -ENOMEM; seg = xfer->seg[cnt] = kmalloc(alloc_size + iso_pkt_descr_size, GFP_ATOMIC); if (seg == NULL) |