From: Marc Ferland ferlandm@amotus.ca
[ Upstream commit 0ba2df09f1500d3f27398a3382b86d39c3e6abe2 ]
The xilinx_dma_poll_timeout macro is sometimes called while holding a spinlock (see xilinx_dma_issue_pending() for an example) this means we shouldn't sleep when polling the dma channel registers. To address it in xilinx poll timeout macro use readl_poll_timeout_atomic instead of readl_poll_timeout variant.
Signed-off-by: Marc Ferland ferlandm@amotus.ca Signed-off-by: Radhey Shyam Pandey radhey.shyam.pandey@xilinx.com Link: https://lore.kernel.org/r/1604473206-32573-2-git-send-email-radhey.shyam.pan... Signed-off-by: Vinod Koul vkoul@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/dma/xilinx/xilinx_dma.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/dma/xilinx/xilinx_dma.c b/drivers/dma/xilinx/xilinx_dma.c index 43acba2a1c0ee..a6abfe702c5a3 100644 --- a/drivers/dma/xilinx/xilinx_dma.c +++ b/drivers/dma/xilinx/xilinx_dma.c @@ -454,8 +454,8 @@ struct xilinx_dma_device { #define to_dma_tx_descriptor(tx) \ container_of(tx, struct xilinx_dma_tx_descriptor, async_tx) #define xilinx_dma_poll_timeout(chan, reg, val, cond, delay_us, timeout_us) \ - readl_poll_timeout(chan->xdev->regs + chan->ctrl_offset + reg, val, \ - cond, delay_us, timeout_us) + readl_poll_timeout_atomic(chan->xdev->regs + chan->ctrl_offset + reg, \ + val, cond, delay_us, timeout_us)
/* IO accessors */ static inline u32 dma_read(struct xilinx_dma_chan *chan, u32 reg)