target/linux/leon/patches/023-greth_handle_frame_error_interrupts.patch

   1 From f62c047af910c9c9696db7b47472a3728b8100e8 Mon Sep 17 00:00:00 2001
   2 From: Daniel Hellstrom <daniel@gaisler.com>
   3 Date: Wed, 1 Dec 2010 11:56:22 +0100
   4 Subject: [PATCH] GRETH: handle frame error interrupts
   5
   6 Not handling frame error interrupts are unlikly but may lead to dead
   7 lock if 128 error frames are recieved in a row.
   8
   9 Signed-off-by: Daniel Hellstrom <daniel@gaisler.com>
  10 ---
  11  drivers/net/greth.c |    5 +++--
  12  drivers/net/greth.h |    2 ++
  13  2 files changed, 5 insertions(+), 2 deletions(-)
  14
  15 --- a/drivers/net/greth.c
  16 +++ b/drivers/net/greth.c
  17 @@ -595,11 +595,12 @@ static irqreturn_t greth_interrupt(int i
  18         status = GRETH_REGLOAD(greth->regs->status);
  19
  20         /* Handle rx and tx interrupts through poll */
  21 -       if (status & (GRETH_INT_RX | GRETH_INT_TX)) {
  22 +       if (status & (GRETH_INT_RE | GRETH_INT_RX | GRETH_INT_TE | GRETH_INT_TX)) {
  23
  24                 /* Clear interrupt status */
  25                 GRETH_REGSAVE(greth->regs->status,
  26 -                             status & (GRETH_INT_RX | GRETH_INT_TX));
  27 +                             status & (GRETH_INT_RE | GRETH_INT_RX |
  28 +                                       GRETH_INT_TE | GRETH_INT_TX));
  29
  30                 retval = IRQ_HANDLED;
  31
  32 --- a/drivers/net/greth.h
  33 +++ b/drivers/net/greth.h
  34 @@ -23,6 +23,7 @@
  35  #define GRETH_BD_LEN 0x7FF
  36
  37  #define GRETH_TXEN 0x1
  38 +#define GRETH_INT_TE 0x2
  39  #define GRETH_INT_TX 0x8
  40  #define GRETH_TXI 0x4
  41  #define GRETH_TXBD_STATUS 0x0001C000
  42 @@ -35,6 +36,7 @@
  43  #define GRETH_TXBD_ERR_UE 0x4000
  44  #define GRETH_TXBD_ERR_AL 0x8000
  45
  46 +#define GRETH_INT_RE         0x1
  47  #define GRETH_INT_RX         0x4
  48  #define GRETH_RXEN           0x2
  49  #define GRETH_RXI            0x8