Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 4012e7d0 authored by Alexandre Torgue's avatar Alexandre Torgue Committed by David S. Miller
Browse files

net: stmmac: handle endianness in dwmac4_get_timestamp 



GMAC IP is little-endian and used on several kind of CPU (big or little
endian). Main callbacks functions of the stmmac drivers take care about
it. It was not the case for dwmac4_get_timestamp function.

Fixes: ba1ffd74 ("stmmac: fix PTP support for GMAC4")
Signed-off-by: default avatarAlexandre Torgue <alexandre.torgue@st.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 31a1b8d5

drivers/net/ethernet/stmicro/stmmac/dwmac4_descs.c

+6 −3
Original line number Diff line number Diff line
@@ -241,15 +241,18 @@ static inline void dwmac4_get_timestamp(void *desc, u32 ats, u64 *ts) 
static int dwmac4_rx_check_timestamp(void *desc)

{

	struct dma_desc *p = (struct dma_desc *)desc;

	unsigned int rdes0 = le32_to_cpu(p->des0);

	unsigned int rdes1 = le32_to_cpu(p->des1);

	unsigned int rdes3 = le32_to_cpu(p->des3);

	u32 own, ctxt;

	int ret = 1;



	own = p->des3 & RDES3_OWN;

	ctxt = ((p->des3 & RDES3_CONTEXT_DESCRIPTOR)

	own = rdes3 & RDES3_OWN;

	ctxt = ((rdes3 & RDES3_CONTEXT_DESCRIPTOR)

		>> RDES3_CONTEXT_DESCRIPTOR_SHIFT);



	if (likely(!own && ctxt)) {

		if ((p->des0 == 0xffffffff) && (p->des1 == 0xffffffff))

		if ((rdes0 == 0xffffffff) && (rdes1 == 0xffffffff))

			/* Corrupted value */

			ret = -EINVAL;

		else