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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: Daniel Hellstrom <daniel@gaisler.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Daniel Hellstrom 2011-01-14 03:02:42 +00:00 committed by David S. Miller
parent 2436af8ca7
commit 1ca23434dd
2 changed files with 7 additions and 4 deletions
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9
drivers/net/greth.c
View File

@ -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() */

2
drivers/net/greth.h
View File

@ -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