Commit 1ca23434 authored by Daniel Hellstrom's avatar Daniel Hellstrom Committed by David S. Miller
Browse files

GRETH: handle frame error interrupts 



Frame error interrupts must also be handled since the RX flag only indicates
successful reception, it is unlikely but the old code may lead to dead lock
if 128 error frames are recieved in a row.

Signed-off-by: default avatarDaniel Hellstrom <daniel@gaisler.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 2436af8c

drivers/net/greth.c

+5 −4
Original line number Diff line number Diff line
@@ -586,12 +586,13 @@ static irqreturn_t greth_interrupt(int irq, void *dev_id) 
	status = GRETH_REGLOAD(greth->regs->status);



	/* Handle rx and tx interrupts through poll */

	if (status & (GRETH_INT_RX | GRETH_INT_TX)) {

	if (status & (GRETH_INT_RE | GRETH_INT_RX |

		      GRETH_INT_TE | GRETH_INT_TX)) {



		/* Clear interrupt status */

		GRETH_REGORIN(greth->regs->status,

			      status & (GRETH_INT_RX | GRETH_INT_TX));



		GRETH_REGSAVE(greth->regs->status,

			      status & (GRETH_INT_RE | GRETH_INT_RX |

					GRETH_INT_TE | GRETH_INT_TX));

		retval = IRQ_HANDLED;



		/* Disable interrupts and schedule poll() */

drivers/net/greth.h

+2 −0
Original line number Diff line number Diff line
@@ -23,6 +23,7 @@ 
#define GRETH_BD_LEN 0x7FF



#define GRETH_TXEN 0x1

#define GRETH_INT_TE 0x2

#define GRETH_INT_TX 0x8

#define GRETH_TXI 0x4

#define GRETH_TXBD_STATUS 0x0001C000
@@ -35,6 +36,7 @@ 
#define GRETH_TXBD_ERR_UE 0x4000

#define GRETH_TXBD_ERR_AL 0x8000



#define GRETH_INT_RE         0x1

#define GRETH_INT_RX         0x4

#define GRETH_RXEN           0x2

#define GRETH_RXI            0x8

CRA Git | Maintained and supported by SUSTech CRA and CCSE