From 4119904f3ebf30c25afb42195740f9ee5dc7749c Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Tue, 19 Apr 2011 07:42:03 -0700 Subject: [PATCH] iwlagn: introduce silent grabbing of NIC access There are a few cases like the WoWLAN support I'm writing that require attempting to access the NIC when it is known that it might not be accessible, e.g. after the system woke up and the platform might have reset the device. To avoid messages in this case, introduce the new function iwl_grab_nic_access_silent(), it will only return an error status. Signed-off-by: Johannes Berg Signed-off-by: Wey-Yi Guy --- drivers/net/wireless/iwlwifi/iwl-io.c | 18 +++++++++++++----- drivers/net/wireless/iwlwifi/iwl-io.h | 1 + 2 files changed, 14 insertions(+), 5 deletions(-) diff --git a/drivers/net/wireless/iwlwifi/iwl-io.c b/drivers/net/wireless/iwlwifi/iwl-io.c index 993b3df1b72b..aa4a90674452 100644 --- a/drivers/net/wireless/iwlwifi/iwl-io.c +++ b/drivers/net/wireless/iwlwifi/iwl-io.c @@ -73,10 +73,9 @@ int iwl_poll_bit(struct iwl_priv *priv, u32 addr, return -ETIMEDOUT; } -int iwl_grab_nic_access(struct iwl_priv *priv) +int iwl_grab_nic_access_silent(struct iwl_priv *priv) { int ret; - u32 val; lockdep_assert_held(&priv->reg_lock); @@ -107,9 +106,6 @@ int iwl_grab_nic_access(struct iwl_priv *priv) (CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY | CSR_GP_CNTRL_REG_FLAG_GOING_TO_SLEEP), 15000); if (ret < 0) { - val = iwl_read32(priv, CSR_GP_CNTRL); - IWL_ERR(priv, - "MAC is in deep sleep!. CSR_GP_CNTRL = 0x%08X\n", val); iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_FORCE_NMI); return -EIO; } @@ -117,6 +113,18 @@ int iwl_grab_nic_access(struct iwl_priv *priv) return 0; } +int iwl_grab_nic_access(struct iwl_priv *priv) +{ + int ret = iwl_grab_nic_access_silent(priv); + if (ret) { + u32 val = iwl_read32(priv, CSR_GP_CNTRL); + IWL_ERR(priv, + "MAC is in deep sleep!. CSR_GP_CNTRL = 0x%08X\n", val); + } + + return ret; +} + void iwl_release_nic_access(struct iwl_priv *priv) { lockdep_assert_held(&priv->reg_lock); diff --git a/drivers/net/wireless/iwlwifi/iwl-io.h b/drivers/net/wireless/iwlwifi/iwl-io.h index 262e0262496d..869edc580ec6 100644 --- a/drivers/net/wireless/iwlwifi/iwl-io.h +++ b/drivers/net/wireless/iwlwifi/iwl-io.h @@ -62,6 +62,7 @@ int iwl_poll_bit(struct iwl_priv *priv, u32 addr, int iwl_poll_direct_bit(struct iwl_priv *priv, u32 addr, u32 mask, int timeout); +int iwl_grab_nic_access_silent(struct iwl_priv *priv); int iwl_grab_nic_access(struct iwl_priv *priv); void iwl_release_nic_access(struct iwl_priv *priv); -- 2.20.1