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| author | Shinya Kuribayashi <shinya.kuribayashi@necel.com> | 2008-01-16 16:11:14 +0900 |
|---|---|---|
| committer | Ben Warren <biggerbadderben@gmail.com> | 2008-01-16 17:37:35 -0500 |
| commit | d1276c76c1e2b5035296689280ba1acb2c425104 (patch) | |
| tree | 2ef8ecc21b7d213e0ee6664306acdd5d0aaff44f /drivers/net | |
| parent | 18ee320ff63edbf7b27bbeb05f0e12a52302c68a (diff) | |
| download | u-boot-imx-d1276c76c1e2b5035296689280ba1acb2c425104.zip u-boot-imx-d1276c76c1e2b5035296689280ba1acb2c425104.tar.gz u-boot-imx-d1276c76c1e2b5035296689280ba1acb2c425104.tar.bz2 | |
drivers/net/rtl8139.c: Fix tx timeout
"to = (currticks() + RTL_TIMEOUT)" has possibilities to wrap around. If it
does, the condition "(currticks() < to)" becomes invalid and immediately
leads to tx timeout error. This patch introduces the fine-graded udely(10)
loops to ease the impact of wrapping around.
Signed-off-by: Shinya Kuribayashi <shinya.kuribayashi@necel.com>
Cc: Masami Komiya <mkomiya@sonare.it>
Cc: Lucas Jin <lucasjin@gmail.com>
Signed-off-by: Ben Warren <biggerbadderben@gmail.com>
Diffstat (limited to 'drivers/net')
| -rw-r--r-- | drivers/net/rtl8139.c | 17 |
1 files changed, 7 insertions, 10 deletions
diff --git a/drivers/net/rtl8139.c b/drivers/net/rtl8139.c index 4c24805..5d7ae74 100644 --- a/drivers/net/rtl8139.c +++ b/drivers/net/rtl8139.c @@ -80,10 +80,7 @@ #if defined(CONFIG_CMD_NET) && defined(CONFIG_NET_MULTI) && \ defined(CONFIG_RTL8139) -#define TICKS_PER_SEC CFG_HZ -#define TICKS_PER_MS (TICKS_PER_SEC/1000) - -#define RTL_TIMEOUT (1*TICKS_PER_SEC) +#define RTL_TIMEOUT 100000 #define ETH_FRAME_LEN 1514 #define ETH_ALEN 6 @@ -414,9 +411,10 @@ static void rtl_reset(struct eth_device *dev) static int rtl_transmit(struct eth_device *dev, volatile void *packet, int length) { - unsigned int status, to; + unsigned int status; unsigned long txstatus; unsigned int len = length; + int i = 0; ioaddr = dev->iobase; @@ -436,8 +434,6 @@ static int rtl_transmit(struct eth_device *dev, volatile void *packet, int lengt outl(((TX_FIFO_THRESH<<11) & 0x003f0000) | len, ioaddr + TxStatus0 + cur_tx*4); - to = currticks() + RTL_TIMEOUT; - do { status = inw(ioaddr + IntrStatus); /* Only acknlowledge interrupt sources we can properly handle @@ -445,7 +441,8 @@ static int rtl_transmit(struct eth_device *dev, volatile void *packet, int lengt * rtl_poll() function. */ outw(status & (TxOK | TxErr | PCIErr), ioaddr + IntrStatus); if ((status & (TxOK | TxErr | PCIErr)) != 0) break; - } while (currticks() < to); + udelay(10); + } while (i++ < RTL_TIMEOUT); txstatus = inl(ioaddr + TxStatus0 + cur_tx*4); @@ -458,8 +455,8 @@ static int rtl_transmit(struct eth_device *dev, volatile void *packet, int lengt return length; } else { #ifdef DEBUG_TX - printf("tx timeout/error (%d ticks), status %hX txstatus %X\n", - currticks()-to, status, txstatus); + printf("tx timeout/error (%d usecs), status %hX txstatus %X\n", + 10*i, status, txstatus); #endif rtl_reset(dev); |