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| author | Yoshihiro Shimoda <[email protected]> | 2018-07-11 02:10:16 +0000 |
|---|---|---|
| committer | Vinod Koul <[email protected]> | 2018-07-11 05:17:31 +0000 |
| commit | 8115ce745fa26ccffe7d1a542ab4322acf4a682d (patch) | |
| tree | 5c516be732e1479e3d6f37a2a21bd47c6d0f23fe /lib/bitmap.c | |
| parent | dmaengine: sh: rcar-dmac: add a new function to clear CHCR.DE with barrier (diff) | |
| download | kernel-8115ce745fa26ccffe7d1a542ab4322acf4a682d.tar.gz kernel-8115ce745fa26ccffe7d1a542ab4322acf4a682d.zip | |
dmaengine: sh: rcar-dmac: Add dma_pause operation
This patch adds dma_pause operation. This patch is based on
Muhammad Hamza Farooq's patch.
After this patch applied, an issue that the sh-sci driver with
high baud rate might cause data lost disappeared because the DMAC
is possible to transmit between [1] and [2] below, and then
the residue of [1] is not true:
In rx_timer_fn() of the sh-sci.c:
dmaengine_pause();
...
dmaengine_tx_status(); /* [1] */
...
dmaengine_terminate_all(); /* [2] */
Signed-off-by: Yoshihiro Shimoda <[email protected]>
Signed-off-by: Vinod Koul <[email protected]>
Diffstat (limited to 'lib/bitmap.c')
0 files changed, 0 insertions, 0 deletions