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authorJohannes Berg <johannes.berg@intel.com>2011-04-19 18:42:03 +0400
committerWey-Yi Guy <wey-yi.w.guy@intel.com>2011-04-30 19:39:22 +0400
commit4119904f3ebf30c25afb42195740f9ee5dc7749c (patch)
tree0ed756ad1cbd947db9c969b231a0a466b624e83c /drivers/net/wireless/iwlwifi/iwl-io.c
parent9d39e5bad76a8830a8fa0c03cadc1e36ce2ec2ef (diff)
downloadlinux-4119904f3ebf30c25afb42195740f9ee5dc7749c.tar.xz
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 <johannes.berg@intel.com> Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Diffstat (limited to 'drivers/net/wireless/iwlwifi/iwl-io.c')
-rw-r--r--drivers/net/wireless/iwlwifi/iwl-io.c18
1 files changed, 13 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);