mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-22 17:01:14 +00:00
dw_dmac: Calling dwc_scan_descriptors from dwc_tx_status() after taking lock
Lock must be taken before calling dwc_scan_descriptors, as this may access/modify shared data and queues. dwc_tx_status wasn't taking lock before calling this routine. This patch add code that takes lock before calling dwc_scan_descriptors. Signed-off-by: Viresh Kumar <viresh.kumar@st.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
This commit is contained in:
parent
f336e42f73
commit
569432efa7
1 changed files with 2 additions and 0 deletions
|
@ -836,7 +836,9 @@ dwc_tx_status(struct dma_chan *chan,
|
|||
|
||||
ret = dma_async_is_complete(cookie, last_complete, last_used);
|
||||
if (ret != DMA_SUCCESS) {
|
||||
spin_lock_bh(&dwc->lock);
|
||||
dwc_scan_descriptors(to_dw_dma(chan->device), dwc);
|
||||
spin_unlock_bh(&dwc->lock);
|
||||
|
||||
last_complete = dwc->completed;
|
||||
last_used = chan->cookie;
|
||||
|
|
Loading…
Reference in a new issue