diff options
| author | Lukas Wunner <lukas@wunner.de> | 2018-11-08 08:06:10 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-01-13 10:05:30 +0100 |
| commit | 1330179228ac342f8f638d0d541e6f4a50b29b8f (patch) | |
| tree | 8d3c2fb9310c01b047da9c9824bf67c403bbe310 /drivers/usb/class/cdc-acm.c | |
| parent | aa5cab08cd9a2a8c15e52c57ebd108eac88e3e8c (diff) | |
spi: bcm2835: Fix race on DMA termination
commit e82b0b3828451c1cd331d9f304c6078fcd43b62e upstream.
If a DMA transfer finishes orderly right when spi_transfer_one_message()
determines that it has timed out, the callbacks bcm2835_spi_dma_done()
and bcm2835_spi_handle_err() race to call dmaengine_terminate_all(),
potentially leading to double termination.
Prevent by atomically changing the dma_pending flag before calling
dmaengine_terminate_all().
Signed-off-by: Lukas Wunner <lukas@wunner.de>
Fixes: 3ecd37edaa2a ("spi: bcm2835: enable dma modes for transfers meeting certain conditions")
Cc: stable@vger.kernel.org # v4.2+
Cc: Mathias Duckeck <m.duckeck@kunbus.de>
Cc: Frank Pavlic <f.pavlic@kunbus.de>
Cc: Martin Sperl <kernel@martin.sperl.org>
Cc: Noralf Trønnes <noralf@tronnes.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/class/cdc-acm.c')
0 files changed, 0 insertions, 0 deletions