diff options
| author | Leigh Brown <leigh@solinno.co.uk> | 2013-10-29 13:33:32 +0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2013-10-30 02:53:36 +0400 |
| commit | 839f46bb4cf73d20d76195d4f2de34801180ae7c (patch) | |
| tree | 96a9dc3d8c0a24a6097cb934e7f1a6594e961f8a /drivers/net/ethernet/marvell/mvmdio.c | |
| parent | b70cd1c1a95ab2a50ffc5e1070c9e90931b92261 (diff) | |
| download | linux-839f46bb4cf73d20d76195d4f2de34801180ae7c.tar.xz | |
net: mvmdio: orion_mdio_ready: remove manual poll
Replace manual poll of MVMDIO_SMI_READ_VALID with a call to
orion_mdio_wait_ready. This ensures a consistent timeout,
eliminates a busy loop, and allows for use of interrupts on
systems that support them.
Signed-off-by: Leigh Brown <leigh@solinno.co.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/marvell/mvmdio.c')
| -rw-r--r-- | drivers/net/ethernet/marvell/mvmdio.c | 34 |
1 files changed, 13 insertions, 21 deletions
diff --git a/drivers/net/ethernet/marvell/mvmdio.c b/drivers/net/ethernet/marvell/mvmdio.c index 971a4c1bbbaa..e3898b3c91ad 100644 --- a/drivers/net/ethernet/marvell/mvmdio.c +++ b/drivers/net/ethernet/marvell/mvmdio.c @@ -110,43 +110,35 @@ static int orion_mdio_read(struct mii_bus *bus, int mii_id, int regnum) { struct orion_mdio_dev *dev = bus->priv; - int count; u32 val; int ret; mutex_lock(&dev->lock); ret = orion_mdio_wait_ready(bus); - if (ret < 0) { - mutex_unlock(&dev->lock); - return ret; - } + if (ret < 0) + goto out; writel(((mii_id << MVMDIO_SMI_PHY_ADDR_SHIFT) | (regnum << MVMDIO_SMI_PHY_REG_SHIFT) | MVMDIO_SMI_READ_OPERATION), dev->regs); - /* Wait for the value to become available */ - count = 0; - while (1) { - val = readl(dev->regs); - if (val & MVMDIO_SMI_READ_VALID) - break; - - if (count > 100) { - dev_err(bus->parent, "Timeout when reading PHY\n"); - mutex_unlock(&dev->lock); - return -ETIMEDOUT; - } + ret = orion_mdio_wait_ready(bus); + if (ret < 0) + goto out; - udelay(10); - count++; + val = readl(dev->regs); + if (!(val & MVMDIO_SMI_READ_VALID)) { + dev_err(bus->parent, "SMI bus read not valid\n"); + ret = -ENODEV; + goto out; } + ret = val & 0xFFFF; +out: mutex_unlock(&dev->lock); - - return val & 0xFFFF; + return ret; } static int orion_mdio_write(struct mii_bus *bus, int mii_id, |