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| author | Wolfgang Grandegger <wg@grandegger.com> | 2017-09-14 18:37:14 +0200 |
|---|---|---|
| committer | Marc Kleine-Budde <mkl@pengutronix.de> | 2017-10-19 13:05:54 +0200 |
| commit | 97819f943063b622eca44d3644067c190dc75039 (patch) | |
| tree | b6da0141e32b12829a7c23601835853bd043fccf /net | |
| parent | 72d92e865d1560723e1957ee3f393688c49ca5bf (diff) | |
| download | linux-stable-97819f943063b622eca44d3644067c190dc75039.tar.gz linux-stable-97819f943063b622eca44d3644067c190dc75039.tar.bz2 linux-stable-97819f943063b622eca44d3644067c190dc75039.zip | |
can: gs_usb: fix busy loop if no more TX context is available
If sending messages with no cable connected, it quickly happens that
there is no more TX context available. Then "gs_can_start_xmit()"
returns with "NETDEV_TX_BUSY" and the upper layer does retry
immediately keeping the CPU busy. To fix that issue, I moved
"atomic_dec(&dev->active_tx_urbs)" from "gs_usb_xmit_callback()" to
the TX done handling in "gs_usb_receive_bulk_callback()". Renaming
"active_tx_urbs" to "active_tx_contexts" and moving it into
"gs_[alloc|free]_tx_context()" would also make sense.
Signed-off-by: Wolfgang Grandegger <wg@grandegger.com>
Cc: linux-stable <stable@vger.kernel.org>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Diffstat (limited to 'net')
0 files changed, 0 insertions, 0 deletions