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ar71xx: re-enable descriptor splitting on ar716x after the previous bugfixes (#13072)
[openwrt/openwrt.git]
/
target
/
linux
/
ar71xx
/
files
/
drivers
/
net
/
ethernet
/
atheros
/
ag71xx
/
ag71xx_main.c
diff --git
a/target/linux/ar71xx/files/drivers/net/ethernet/atheros/ag71xx/ag71xx_main.c
b/target/linux/ar71xx/files/drivers/net/ethernet/atheros/ag71xx/ag71xx_main.c
index b0f39159c133520a52e17c1d56f84c2ef92656cf..2a7567ede5f6f007603de80a4fb469d37dad10f1 100644
(file)
--- a/
target/linux/ar71xx/files/drivers/net/ethernet/atheros/ag71xx/ag71xx_main.c
+++ b/
target/linux/ar71xx/files/drivers/net/ethernet/atheros/ag71xx/ag71xx_main.c
@@
-704,7
+704,12
@@
static int ag71xx_fill_dma_desc(struct ag71xx_ring *ring, u32 addr, int len)
if (cur_len > split) {
cur_len = split;
- if (len < split + 4)
+
+ /*
+ * TX will hang if DMA transfers <= 4 bytes,
+ * make sure next segment is more than 4 bytes long.
+ */
+ if (len <= split + 4)
cur_len -= 4;
}