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| author | Lennert Buytenhek <buytenh@wantstofly.org> | 2008-07-15 02:15:24 +0200 |
|---|---|---|
| committer | Lennert Buytenhek <buytenh@marvell.com> | 2008-07-24 06:22:51 +0200 |
| commit | ae9ae06443f7bfa4f013c0e2c035d549e999ad3e (patch) | |
| tree | 464b7e9f5bc9225d6944d4d484cf44f468c56f91 /drivers/net/mv643xx_eth.c | |
| parent | 65193a91fc60fdb79e392c9842c10552a1fa3e1c (diff) | |
| download | talos-obmc-linux-ae9ae06443f7bfa4f013c0e2c035d549e999ad3e.tar.gz talos-obmc-linux-ae9ae06443f7bfa4f013c0e2c035d549e999ad3e.zip | |
mv643xx_eth: also check TX_IN_PROGRESS when disabling transmit path
The recommended sequence for waiting for the transmit path to clear
after disabling all of the transmit queues is to wait for the
TX_FIFO_EMPTY bit in the Port Status register to become set as well
as the TX_IN_PROGRESS bit to clear.
Signed-off-by: Lennert Buytenhek <buytenh@marvell.com>
Diffstat (limited to 'drivers/net/mv643xx_eth.c')
| -rw-r--r-- | drivers/net/mv643xx_eth.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/drivers/net/mv643xx_eth.c b/drivers/net/mv643xx_eth.c index 207d4391a6de..c700c1f494e9 100644 --- a/drivers/net/mv643xx_eth.c +++ b/drivers/net/mv643xx_eth.c @@ -90,6 +90,7 @@ static char mv643xx_eth_driver_version[] = "1.1"; #define PORT_SERIAL_CONTROL(p) (0x043c + ((p) << 10)) #define PORT_STATUS(p) (0x0444 + ((p) << 10)) #define TX_FIFO_EMPTY 0x00000400 +#define TX_IN_PROGRESS 0x00000080 #define TXQ_COMMAND(p) (0x0448 + ((p) << 10)) #define TXQ_FIX_PRIO_CONF(p) (0x044c + ((p) << 10)) #define TX_BW_RATE(p) (0x0450 + ((p) << 10)) @@ -2039,8 +2040,14 @@ static void port_reset(struct mv643xx_eth_private *mp) if (mp->txq_mask & (1 << i)) txq_disable(mp->txq + i); } - while (!(rdl(mp, PORT_STATUS(mp->port_num)) & TX_FIFO_EMPTY)) + + while (1) { + u32 ps = rdl(mp, PORT_STATUS(mp->port_num)); + + if ((ps & (TX_IN_PROGRESS | TX_FIFO_EMPTY)) == TX_FIFO_EMPTY) + break; udelay(10); + } /* Reset the Enable bit in the Configuration Register */ data = rdl(mp, PORT_SERIAL_CONTROL(mp->port_num)); |
