kernel: backport upstream mtk_eth_soc fixes

[openwrt/staging/noltari.git] / target / linux / generic / backport-5.15 / 730-15-v6.3-net-ethernet-mtk_wed-No-need-to-clear-memory-after-a.patch

diff --git a/target/linux/generic/backport-5.15/730-15-v6.3-net-ethernet-mtk_wed-No-need-to-clear-memory-after-a.patch b/target/linux/generic/backport-5.15/730-15-v6.3-net-ethernet-mtk_wed-No-need-to-clear-memory-after-a.patch
new file mode 100644 (file)
index 0000000..74a77dd
--- /dev/null
+++ b/target/linux/generic/backport-5.15/730-15-v6.3-net-ethernet-mtk_wed-No-need-to-clear-memory-after-a.patch
@@ -0,0 +1,26 @@
+From: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
+Date: Sun, 12 Feb 2023 07:51:51 +0100
+Subject: [PATCH] net: ethernet: mtk_wed: No need to clear memory after a
+ dma_alloc_coherent() call
+
+dma_alloc_coherent() already clears the allocated memory, there is no need
+to explicitly call memset().
+
+Moreover, it is likely that the size in the memset() is incorrect and
+should be "size * sizeof(*ring->desc)".
+
+Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
+Link: https://lore.kernel.org/r/d5acce7dd108887832c9719f62c7201b4c83b3fb.1676184599.git.christophe.jaillet@wanadoo.fr
+Signed-off-by: Jakub Kicinski <kuba@kernel.org>
+---
+
+--- a/drivers/net/ethernet/mediatek/mtk_wed.c
++++ b/drivers/net/ethernet/mediatek/mtk_wed.c
+@@ -786,7 +786,6 @@ mtk_wed_rro_ring_alloc(struct mtk_wed_de
+ 
+       ring->desc_size = sizeof(*ring->desc);
+       ring->size = size;
+-      memset(ring->desc, 0, size);
+ 
+       return 0;
+ }