diff options
author | Stanislaw Gruszka <sgruszka@redhat.com> | 2012-02-13 10:23:09 (GMT) |
---|---|---|
committer | John W. Linville <linville@tuxdriver.com> | 2012-02-22 19:51:12 (GMT) |
commit | 1e0f32a43ae652eaa5b23dc06852938555cb8da1 (patch) | |
tree | 374663ec03298f09ad53c1e513e7582da8c508ed /drivers | |
parent | b6603036ad87244bd39ed7bc0612009df7694f5e (diff) | |
download | linux-fsl-qoriq-1e0f32a43ae652eaa5b23dc06852938555cb8da1.tar.xz |
iwlegacy: always check if got h/w access before write
Before we write to the device register always check if
_il_grap_nic_access() was successful.
Change type return type _il_grap_nic_access() to bool, and
add likely()/unlikely() statements.
Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/net/wireless/iwlegacy/4965-mac.c | 2 | ||||
-rw-r--r-- | drivers/net/wireless/iwlegacy/common.c | 10 | ||||
-rw-r--r-- | drivers/net/wireless/iwlegacy/common.h | 27 |
3 files changed, 21 insertions, 18 deletions
diff --git a/drivers/net/wireless/iwlegacy/4965-mac.c b/drivers/net/wireless/iwlegacy/4965-mac.c index 235812a..90c9bfb 100644 --- a/drivers/net/wireless/iwlegacy/4965-mac.c +++ b/drivers/net/wireless/iwlegacy/4965-mac.c @@ -3778,7 +3778,7 @@ il4965_perform_ct_kill_task(struct il_priv *il) _il_rd(il, CSR_UCODE_DRV_GP1); spin_lock_irqsave(&il->reg_lock, flags); - if (!_il_grab_nic_access(il)) + if (likely(_il_grab_nic_access(il))) _il_release_nic_access(il); spin_unlock_irqrestore(&il->reg_lock, flags); } diff --git a/drivers/net/wireless/iwlegacy/common.c b/drivers/net/wireless/iwlegacy/common.c index 3900967..6dbd11f 100644 --- a/drivers/net/wireless/iwlegacy/common.c +++ b/drivers/net/wireless/iwlegacy/common.c @@ -81,7 +81,7 @@ il_clear_bit(struct il_priv *p, u32 r, u32 m) } EXPORT_SYMBOL(il_clear_bit); -int +bool _il_grab_nic_access(struct il_priv *il) { int ret; @@ -116,10 +116,10 @@ _il_grab_nic_access(struct il_priv *il) WARN_ONCE(1, "Timeout waiting for ucode processor access " "(CSR_GP_CNTRL 0x%08x)\n", val); _il_wr(il, CSR_RESET, CSR_RESET_REG_FLAG_FORCE_NMI); - return -EIO; + return false; } - return 0; + return true; } EXPORT_SYMBOL_GPL(_il_grab_nic_access); @@ -161,7 +161,7 @@ il_wr_prph(struct il_priv *il, u32 addr, u32 val) unsigned long reg_flags; spin_lock_irqsave(&il->reg_lock, reg_flags); - if (!_il_grab_nic_access(il)) { + if (likely(_il_grab_nic_access(il))) { _il_wr_prph(il, addr, val); _il_release_nic_access(il); } @@ -194,7 +194,7 @@ il_write_targ_mem(struct il_priv *il, u32 addr, u32 val) unsigned long reg_flags; spin_lock_irqsave(&il->reg_lock, reg_flags); - if (!_il_grab_nic_access(il)) { + if (likely(_il_grab_nic_access(il))) { _il_wr(il, HBUS_TARG_MEM_WADDR, addr); wmb(); _il_wr(il, HBUS_TARG_MEM_WDAT, val); diff --git a/drivers/net/wireless/iwlegacy/common.h b/drivers/net/wireless/iwlegacy/common.h index 7080956..1dfaa58 100644 --- a/drivers/net/wireless/iwlegacy/common.h +++ b/drivers/net/wireless/iwlegacy/common.h @@ -2103,7 +2103,7 @@ irqreturn_t il_isr(int irq, void *data); extern void il_set_bit(struct il_priv *p, u32 r, u32 m); extern void il_clear_bit(struct il_priv *p, u32 r, u32 m); -extern int _il_grab_nic_access(struct il_priv *il); +extern bool _il_grab_nic_access(struct il_priv *il); extern int _il_poll_bit(struct il_priv *il, u32 addr, u32 bits, u32 mask, int timeout); extern int il_poll_bit(struct il_priv *il, u32 addr, u32 mask, int timeout); extern u32 il_rd_prph(struct il_priv *il, u32 reg); @@ -2168,7 +2168,7 @@ il_wr(struct il_priv *il, u32 reg, u32 value) unsigned long reg_flags; spin_lock_irqsave(&il->reg_lock, reg_flags); - if (!_il_grab_nic_access(il)) { + if (likely(_il_grab_nic_access(il))) { _il_wr(il, reg, value); _il_release_nic_access(il); } @@ -2197,9 +2197,10 @@ il_set_bits_prph(struct il_priv *il, u32 reg, u32 mask) unsigned long reg_flags; spin_lock_irqsave(&il->reg_lock, reg_flags); - _il_grab_nic_access(il); - _il_wr_prph(il, reg, (_il_rd_prph(il, reg) | mask)); - _il_release_nic_access(il); + if (likely(_il_grab_nic_access(il))) { + _il_wr_prph(il, reg, (_il_rd_prph(il, reg) | mask)); + _il_release_nic_access(il); + } spin_unlock_irqrestore(&il->reg_lock, reg_flags); } @@ -2209,9 +2210,10 @@ il_set_bits_mask_prph(struct il_priv *il, u32 reg, u32 bits, u32 mask) unsigned long reg_flags; spin_lock_irqsave(&il->reg_lock, reg_flags); - _il_grab_nic_access(il); - _il_wr_prph(il, reg, ((_il_rd_prph(il, reg) & mask) | bits)); - _il_release_nic_access(il); + if (likely(_il_grab_nic_access(il))) { + _il_wr_prph(il, reg, ((_il_rd_prph(il, reg) & mask) | bits)); + _il_release_nic_access(il); + } spin_unlock_irqrestore(&il->reg_lock, reg_flags); } @@ -2222,10 +2224,11 @@ il_clear_bits_prph(struct il_priv *il, u32 reg, u32 mask) u32 val; spin_lock_irqsave(&il->reg_lock, reg_flags); - _il_grab_nic_access(il); - val = _il_rd_prph(il, reg); - _il_wr_prph(il, reg, (val & ~mask)); - _il_release_nic_access(il); + if (likely(_il_grab_nic_access(il))) { + val = _il_rd_prph(il, reg); + _il_wr_prph(il, reg, (val & ~mask)); + _il_release_nic_access(il); + } spin_unlock_irqrestore(&il->reg_lock, reg_flags); } |