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authorRussell King - ARM Linux2011-01-03 22:37:10 +0000
committerDan Williams2011-01-04 19:16:12 -0800
commit56b618820c92a5efa2145fbbac373fffbb024a94 (patch)
treec0e046e1be9007d35d436f4577d3272bec6c45f6 /drivers/dma
parent4c0df6a3ce8eb947647c7ed2640d0172936d8ef3 (diff)
ARM: PL08x: don't try to use llis_bus as a pointer
llis_bus is the DMA address of the LLI array. Casting it to be a pointer just to be able to use pointer arithmetic on it is not nice. We can trivially deal with the places where we do arithmetic on it, and it's actually cleaner this way. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> Acked-by: Linus Walleij <linus.walleij@stericsson.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/dma')
-rw-r--r--drivers/dma/amba-pl08x.c9
1 files changed, 3 insertions, 6 deletions
diff --git a/drivers/dma/amba-pl08x.c b/drivers/dma/amba-pl08x.c
index 1081165d01a3..760b71eec84c 100644
--- a/drivers/dma/amba-pl08x.c
+++ b/drivers/dma/amba-pl08x.c
@@ -559,7 +559,7 @@ static int pl08x_fill_lli_for_desc(struct pl08x_driver_data *pl08x,
u32 cctl, u32 *remainder)
{
struct pl08x_lli *llis_va = txd->llis_va;
- struct pl08x_lli *llis_bus = (struct pl08x_lli *) txd->llis_bus;
+ dma_addr_t llis_bus = txd->llis_bus;
BUG_ON(num_llis >= MAX_NUM_TSFR_LLIS);
@@ -576,8 +576,7 @@ static int pl08x_fill_lli_for_desc(struct pl08x_driver_data *pl08x,
* memory. So we don't manipulate this bit currently.
*/
- llis_va[num_llis].next =
- (dma_addr_t)((u32) &(llis_bus[num_llis + 1]));
+ llis_va[num_llis].next = llis_bus + (num_llis + 1) * sizeof(struct pl08x_lli);
if (cctl & PL080_CONTROL_SRC_INCR)
txd->srcbus.addr += len;
@@ -621,7 +620,6 @@ static int pl08x_fill_llis_for_desc(struct pl08x_driver_data *pl08x,
int max_bytes_per_lli;
int total_bytes = 0;
struct pl08x_lli *llis_va;
- struct pl08x_lli *llis_bus;
txd->llis_va = dma_pool_alloc(pl08x->pool, GFP_NOWAIT,
&txd->llis_bus);
@@ -971,8 +969,7 @@ static void pl08x_free_txd(struct pl08x_driver_data *pl08x,
struct pl08x_txd *txd)
{
/* Free the LLI */
- dma_pool_free(pl08x->pool, txd->llis_va,
- txd->llis_bus);
+ dma_pool_free(pl08x->pool, txd->llis_va, txd->llis_bus);
pl08x->pool_ctr--;