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Subject[PATCH V3 06/20] dmaengine/amba-pl08x: Remove redundant comment and rewrite original
Date
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>
---
drivers/dma/amba-pl08x.c | 15 +++++++--------
1 files changed, 7 insertions(+), 8 deletions(-)

diff --git a/drivers/dma/amba-pl08x.c b/drivers/dma/amba-pl08x.c
index 01c2f50..6c52959 100644
--- 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",
--
1.7.2.2


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