dmaengine/amba-pl08x: Remove redundant comment and rewrite original

Similar comment is present over routine also pl08x_choose_master_bus(). Keeping
one of them. Also rewrite that comment to convey message clearly.

Signed-off-by: Viresh Kumar <viresh.kumar@st.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>

diff --git a/drivers/dma/amba-pl08x.c b/drivers/dma/amba-pl08x.c
index 01c2f507e9507298561ff3d897ca046d5e3172e2..6c52959b00af55d4d2487decc43ee74e97287868 100644 (file)
--- a/drivers/dma/amba-pl08x.c
+++ b/drivers/dma/amba-pl08x.c
@@ -497,9 +497,13 @@ struct pl08x_lli_build_data {
 };
 
 /*
- * Autoselect a master bus to use for the transfer this prefers the
- * destination bus if both available if fixed address on one bus the
- * other will be chosen
+ * Autoselect a master bus to use for the transfer. Slave will be the chosen as
+ * victim in case src & dest are not similarly aligned. i.e. If after aligning
+ * masters address with width requirements of transfer (by sending few byte by
+ * byte data), slave is still not aligned, then its width will be reduced to
+ * BYTE.
+ * - prefers the destination bus if both available
+ * - if fixed address on one bus the other will be chosen
  */
 static void pl08x_choose_master_bus(struct pl08x_lli_build_data *bd,
        struct pl08x_bus_data **mbus, struct pl08x_bus_data **sbus, u32 cctl)
@@ -625,11 +629,6 @@ static int pl08x_fill_llis_for_desc(struct pl08x_driver_data *pl08x,
        /* We need to count this down to zero */
        bd.remainder = txd->len;
 
-       /*
-        * Choose bus to align to
-        * - prefers destination bus if both available
-        * - if fixed address on one bus chooses other
-        */
        pl08x_choose_master_bus(&bd, &mbus, &sbus, cctl);
 
        dev_vdbg(&pl08x->adev->dev, "src=0x%08x%s/%u dst=0x%08x%s/%u len=%zu llimax=%zu\n",