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net: tsec: Re-arm packet buffer in error case

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When an error is detected in the TSEC receive path, the driver currently
prints an error message, but leaves the corresponding packet descriptor
in its old state (i.e. owned by the CPU side). As a result, the packet
queue can be starved of available buffers if enough errors happen.

To recover from errors, re-arm the packet buffer descriptor after an
error has been detected.

Errors can be provoked by changing a PHY with phy-mode = "rgmii-id" to
phy-mode = "rgmii".

Signed-off-by: J. Neuschäfer <j.ne@posteo.net>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
This commit is contained in:
J. Neuschäfer 2025-02-16 22:18:13 +01:00 • committed by Peng Fan
parent a149456d6a
commit 63a23cb465
1 changed files with 3 additions and 0 deletions
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3
drivers/net/tsec.c
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@ -314,6 +314,9 @@ static int tsec_recv(struct udevice *dev, int flags, uchar **packetp)
ret = length - 4;
} else {
printf("Got error %x\n", (status & RXBD_STATS));
/* Rearm the packet buffer */
tsec_free_pkt(dev, NULL, 0);
}
}