diff options
| author | Dave Jiang <dave.jiang@intel.com> | 2015-08-26 13:17:24 -0700 |
|---|---|---|
| committer | Vinod Koul <vinod.koul@intel.com> | 2015-09-21 21:10:05 +0530 |
| commit | ad4a7b5065c1b4f5176e7d031c3cc2b36f776884 (patch) | |
| tree | febe068710e3019801c09c014d6cee2843cb24c3 /drivers/dma/ioat/dma.c | |
| parent | 6ff33f3902c3b1c5d0db6b1e2c70b6d76fba357f (diff) | |
dmaengine: ioatdma: adding shutdown support
The ioatdma needs to be queisced and block all additional op submission
during reboots. When NET_DMA was used, this caused issue as ops were still
being sent to ioatdma during reboots even though PCI BME has been turned
off. Even though NET_DMA has been deprecated, we need to prevent similar
situations. The shutdown handler should address that.
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Diffstat (limited to 'drivers/dma/ioat/dma.c')
| -rw-r--r-- | drivers/dma/ioat/dma.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/dma/ioat/dma.c b/drivers/dma/ioat/dma.c index f66b7e640610..1d5df2ef148b 100644 --- a/drivers/dma/ioat/dma.c +++ b/drivers/dma/ioat/dma.c @@ -197,7 +197,8 @@ static void __ioat_start_null_desc(struct ioatdma_chan *ioat_chan) void ioat_start_null_desc(struct ioatdma_chan *ioat_chan) { spin_lock_bh(&ioat_chan->prep_lock); - __ioat_start_null_desc(ioat_chan); + if (!test_bit(IOAT_CHAN_DOWN, &ioat_chan->state)) + __ioat_start_null_desc(ioat_chan); spin_unlock_bh(&ioat_chan->prep_lock); } |