diff options
author | Esben Haabendal <eha@deif.com> | 2018-08-16 10:43:12 +0200 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-08-24 13:09:23 +0200 |
commit | 82c6d4994ba86ca5edec001f690d9cd3e4cd442f (patch) | |
tree | 4402a02c9f0563bd8a972edcb719593407c577f0 /Makefile | |
parent | 415a02d8b65ae48a8a01694de5ea3c574128710b (diff) |
i2c: imx: Fix race condition in dma read
commit bed4ff1ed4d8f2ef5007c5c6ae1b29c5677a3632 upstream.
This fixes a race condition, where the DMAEN bit ends up being set after
I2C slave has transmitted a byte following the dummy read. When that
happens, an interrupt is generated instead, and no DMA request is generated
to kickstart the DMA read, and a timeout happens after DMA_TIMEOUT (1 sec).
Fixed by setting the DMAEN bit before the dummy read.
Signed-off-by: Esben Haabendal <eha@deif.com>
Acked-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Cc: stable@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'Makefile')
0 files changed, 0 insertions, 0 deletions