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path: root/drivers/dma/cppi41.c
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Diffstat (limited to 'drivers/dma/cppi41.c')
-rw-r--r--drivers/dma/cppi41.c12
1 files changed, 8 insertions, 4 deletions
diff --git a/drivers/dma/cppi41.c b/drivers/dma/cppi41.c
index a58eec3b2cad..b743adf56465 100644
--- a/drivers/dma/cppi41.c
+++ b/drivers/dma/cppi41.c
@@ -1,3 +1,4 @@
+#include <linux/delay.h>
#include <linux/dmaengine.h>
#include <linux/dma-mapping.h>
#include <linux/platform_device.h>
@@ -567,7 +568,7 @@ static int cppi41_tear_down_chan(struct cppi41_channel *c)
reg |= GCR_TEARDOWN;
cppi_writel(reg, c->gcr_reg);
c->td_queued = 1;
- c->td_retry = 100;
+ c->td_retry = 500;
}
if (!c->td_seen || !c->td_desc_seen) {
@@ -603,12 +604,16 @@ static int cppi41_tear_down_chan(struct cppi41_channel *c)
* descriptor before the TD we fetch it from enqueue, it has to be
* there waiting for us.
*/
- if (!c->td_seen && c->td_retry)
+ if (!c->td_seen && c->td_retry) {
+ udelay(1);
return -EAGAIN;
-
+ }
WARN_ON(!c->td_retry);
+
if (!c->td_desc_seen) {
desc_phys = cppi41_pop_desc(cdd, c->q_num);
+ if (!desc_phys)
+ desc_phys = cppi41_pop_desc(cdd, c->q_comp_num);
WARN_ON(!desc_phys);
}
@@ -1088,7 +1093,6 @@ static struct platform_driver cpp41_dma_driver = {
.remove = cppi41_dma_remove,
.driver = {
.name = "cppi41-dma-engine",
- .owner = THIS_MODULE,
.pm = &cppi41_pm_ops,
.of_match_table = of_match_ptr(cppi41_dma_ids),
},