shinys000114/linux
1
0
Fork 0
mirror of https://github.com/hardkernel/linux.git synced 2026-06-08 11:50:43 +09:00
Code Issues Packages Projects Releases Wiki Activity

DMA pl330: pl330_get_desc try more to get desc

Browse Source
This commit is contained in:
hhb
2014-11-19 15:26:15 +08:00
parent 8ba4c03c54
commit 161b114d42
1 changed files with 15 additions and 8 deletions
Download Patch File Download Diff File Expand all files Collapse all files

23
drivers/dma/pl330.c
View File

@@ -2760,22 +2760,29 @@ static struct dma_pl330_desc *pl330_get_desc(struct dma_pl330_chan *pch)
struct dma_pl330_dmac *pdmac = pch->dmac;
u8 *peri_id = pch->chan.private;
struct dma_pl330_desc *desc;
int i = 0;
/* Pluck one desc from the pool of DMAC */
desc = pluck_desc(pdmac);
/* If the DMAC pool is empty, alloc new */
if (!desc) {
if (!add_desc(pdmac, GFP_ATOMIC, 1))
return NULL;
for(i = 0; i < 3; i++) {
if (!add_desc(pdmac, GFP_ATOMIC, 1))
continue;
/* Try again */
desc = pluck_desc(pdmac);
if (!desc) {
dev_err(pch->dmac->pif.dev,
"%s:%d ALERT!\n", __func__, __LINE__);
return NULL;
/* Try again */
desc = pluck_desc(pdmac);
if (!desc) {
dev_err(pch->dmac->pif.dev,
"%s:%d i=%d ALERT!\n", __func__, __LINE__,i);
continue;
}
break;
}
if(!desc && i >= 3)
return NULL;
}
/* Initialize the descriptor */