diff options
| author | Ahmed S. Darwish <a.darwish@linutronix.de> | 2020-06-03 16:49:45 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2020-06-05 00:50:42 +0200 |
| commit | 79cbb6bc3332da7162c2581e151659ab8ebaa528 (patch) | |
| tree | 1d72570f6d07c9aca350aeef39fd06c836f82e3c /drivers/net | |
| parent | net: core: device_rename: Use rwsem instead of a seqcount (diff) | |
| download | linux-79cbb6bc3332da7162c2581e151659ab8ebaa528.tar.xz linux-79cbb6bc3332da7162c2581e151659ab8ebaa528.zip | |
net: phy: fixed_phy: Remove unused seqcount
Commit bf7afb29d545 ("phy: improve safety of fixed-phy MII register
reading") protected the fixed PHY status with a sequence counter.
Two years later, commit d2b977939b18 ("net: phy: fixed-phy: remove
fixed_phy_update_state()") removed the sequence counter's write side
critical section -- neutralizing its read side retry loop.
Remove the unused seqcount.
Signed-off-by: Ahmed S. Darwish <a.darwish@linutronix.de>
Reviewed-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net')
| -rw-r--r-- | drivers/net/phy/fixed_phy.c | 28 |
1 files changed, 11 insertions, 17 deletions
diff --git a/drivers/net/phy/fixed_phy.c b/drivers/net/phy/fixed_phy.c index 4a3d34f40cb9..c4641b1704d6 100644 --- a/drivers/net/phy/fixed_phy.c +++ b/drivers/net/phy/fixed_phy.c @@ -19,7 +19,6 @@ #include <linux/slab.h> #include <linux/of.h> #include <linux/gpio/consumer.h> -#include <linux/seqlock.h> #include <linux/idr.h> #include <linux/netdevice.h> #include <linux/linkmode.h> @@ -34,7 +33,6 @@ struct fixed_mdio_bus { struct fixed_phy { int addr; struct phy_device *phydev; - seqcount_t seqcount; struct fixed_phy_status status; bool no_carrier; int (*link_update)(struct net_device *, struct fixed_phy_status *); @@ -80,19 +78,17 @@ static int fixed_mdio_read(struct mii_bus *bus, int phy_addr, int reg_num) list_for_each_entry(fp, &fmb->phys, node) { if (fp->addr == phy_addr) { struct fixed_phy_status state; - int s; - - do { - s = read_seqcount_begin(&fp->seqcount); - fp->status.link = !fp->no_carrier; - /* Issue callback if user registered it. */ - if (fp->link_update) - fp->link_update(fp->phydev->attached_dev, - &fp->status); - /* Check the GPIO for change in status */ - fixed_phy_update(fp); - state = fp->status; - } while (read_seqcount_retry(&fp->seqcount, s)); + + fp->status.link = !fp->no_carrier; + + /* Issue callback if user registered it. */ + if (fp->link_update) + fp->link_update(fp->phydev->attached_dev, + &fp->status); + + /* Check the GPIO for change in status */ + fixed_phy_update(fp); + state = fp->status; return swphy_read_reg(reg_num, &state); } @@ -150,8 +146,6 @@ static int fixed_phy_add_gpiod(unsigned int irq, int phy_addr, if (!fp) return -ENOMEM; - seqcount_init(&fp->seqcount); - if (irq != PHY_POLL) fmb->mii_bus->irq[phy_addr] = irq; |