drivers/dma/abma-pl08x.c: avoid a 64-bit division callout to libgcc

1 files changed, 33 insertions, 0 deletions

diff --git a/arm-dma-amba_pl08x-avoid-64bit-division.patch b/arm-dma-amba_pl08x-avoid-64bit-division.patch
new file mode 100644
index 000000000..7556e2328
--- /dev/null
+++ b/arm-dma-amba_pl08x-avoid-64bit-division.patch
@@ -0,0 +1,33 @@
+diff --git a/drivers/dma/amba-pl08x.c b/drivers/dma/amba-pl08x.c
+index 06fe45c..4ce4ac1 100644
+--- a/drivers/dma/amba-pl08x.c
++++ b/drivers/dma/amba-pl08x.c
+@@ -886,8 +886,8 @@ static int pl08x_fill_llis_for_desc(struct pl08x_driver_data *pl08x,
+ 				return 0;
+ 			}
+ 
+-			if ((bd.srcbus.addr % bd.srcbus.buswidth) ||
+-					(bd.dstbus.addr % bd.dstbus.buswidth)) {
++			if ((((u8)(bd.srcbus.addr & 0xff)) % bd.srcbus.buswidth) ||
++					(((u8)(bd.dstbus.addr & 0xff)) % bd.dstbus.buswidth)) {
+ 				dev_err(&pl08x->adev->dev,
+ 					"%s src & dst address must be aligned to src"
+ 					" & dst width if peripheral is flow controller",
+@@ -908,7 +908,7 @@ static int pl08x_fill_llis_for_desc(struct pl08x_driver_data *pl08x,
+ 		 */
+ 		if (bd.remainder < mbus->buswidth)
+ 			early_bytes = bd.remainder;
+-		else if ((mbus->addr) % (mbus->buswidth)) {
++		else if (((u8)(mbus->addr & 0xff)) % (mbus->buswidth)) {
+ 			early_bytes = mbus->buswidth - (mbus->addr) %
+ 				(mbus->buswidth);
+ 			if ((bd.remainder - early_bytes) < mbus->buswidth)
+@@ -928,7 +928,7 @@ static int pl08x_fill_llis_for_desc(struct pl08x_driver_data *pl08x,
+ 			 * Master now aligned
+ 			 * - if slave is not then we must set its width down
+ 			 */
+-			if (sbus->addr % sbus->buswidth) {
++			if (((u8)(sbus->addr & 0xff)) % sbus->buswidth) {
+ 				dev_dbg(&pl08x->adev->dev,
+ 					"%s set down bus width to one byte\n",
+ 					__func__);