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stmmac: display the descriptors if DES0 = 0 

It makes sense to display the descriptors even if
DES0 is zero. This helps for example in case of it
is needed to dump rx write-back descriptors to get
timestamp status.

Signed-off-by: Giuseppe Cavallaro <peppe.cavallaro@st.com>
Cc: Alexandre TORGUE <alexandre.torgue@st.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Giuseppe CAVALLARO 2016-10-20 10:01:28 +02:00 committed by David S. Miller
parent ae3877bce5
commit 8be0328e52
1 changed files with 3 additions and 4 deletions
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7
drivers/net/ethernet/stmicro/stmmac/dwmac4_descs.c
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@ -347,10 +347,9 @@ static void dwmac4_display_ring(void *head, unsigned int size, bool rx)
pr_info("%s descriptor ring:\n", rx ? "RX" : "TX");
for (i = 0; i < size; i++) {
if (p->des0)
pr_info("%d [0x%x]: 0x%x 0x%x 0x%x 0x%x\n",
i, (unsigned int)virt_to_phys(p),
p->des0, p->des1, p->des2, p->des3);
pr_info("%d [0x%x]: 0x%x 0x%x 0x%x 0x%x\n",
i, (unsigned int)virt_to_phys(p),
p->des0, p->des1, p->des2, p->des3);
p++;
}
}