net: stmmac: RX buffer size must be 16 byte aligned

BugLink: https://bugs.launchpad.net/bugs/1861929
[ Upstream commit 8d558f0294fe92e04af192e221d0d0f6a180ee7b ]

We need to align the RX buffer size to at least 16 byte so that IP
doesn't mis-behave. This is required by HW.

Changes from v2:
- Align UP and not DOWN (David)

Fixes: 7ac6653a085b ("stmmac: Move the STMicroelectronics driver")
Signed-off-by: Jose Abreu <Jose.Abreu@synopsys.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
Signed-off-by: Khalid Elmously <khalid.elmously@canonical.com>

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index 222370ad4d558fa0edb90217938bbf362cb93ebe..8de49be5d74f4aa61c8d06b13e44527dc442213a 100644 (file)
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -45,7 +45,7 @@
 #include "dwxgmac2.h"
 #include "hwif.h"
 
-#define        STMMAC_ALIGN(x)         __ALIGN_KERNEL(x, SMP_CACHE_BYTES)
+#define        STMMAC_ALIGN(x)         ALIGN(ALIGN(x, SMP_CACHE_BYTES), 16)
 #define        TSO_MAX_BUFF_SIZE       (SZ_16K - 1)
 
 /* Module parameters */