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iwl3945: fix deep sleep when removing the driver. 

A warning message "MAC is in deep sleep" sometimes happen when user removes
the driver.  This warning is related to card not being ready. In __iwl3945_down
function some of the going down steps are in wrong order, to fix this this patch
do the following:
	1- make sure we are calling iwl3945_apm_reset and iwl3945_apm_stop
	   in the right order.

	2- make sure we set CSR_GP_CNTRL_REG_FLAG_INIT_DONE in apm_reset before
	   poll on CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY.

	3- set correct polling counter.

This fixes bug
http://www.intellinuxwireless.org/bugzilla/show_bug.cgi?id=1834

Signed-off-by: mohamed abbas <mohamed.abbas@intel.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Abbas, Mohamed 2009-01-20 21:33:55 -08:00 committed by John W. Linville
parent c0af96a6e6
commit e9414b6b3f
3 changed files with 10 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
drivers/net/wireless/iwlwifi/iwl-3945.c
View File

@ -1338,6 +1338,9 @@ static int iwl3945_apm_reset(struct iwl_priv *priv)
spin_lock_irqsave(&priv->lock, flags);
iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
udelay(10);
iwl_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
iwl_poll_direct_bit(priv, CSR_GP_CNTRL,
CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
@ -1347,11 +1350,6 @@ static int iwl3945_apm_reset(struct iwl_priv *priv)
iwl_write_prph(priv, APMG_CLK_CTRL_REG,
APMG_CLK_VAL_BSM_CLK_RQT);
udelay(10);
iwl_set_bit(priv, CSR_GP_CNTRL,
CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
iwl_write_prph(priv, APMG_RTC_INT_MSK_REG, 0x0);
iwl_write_prph(priv, APMG_RTC_INT_STT_REG,
0xFFFFFFFF);

2
drivers/net/wireless/iwlwifi/iwl-io.h
View File

@ -165,7 +165,7 @@ static inline int _iwl_grab_nic_access(struct iwl_priv *priv)
ret = _iwl_poll_bit(priv, CSR_GP_CNTRL,
CSR_GP_CNTRL_REG_VAL_MAC_ACCESS_EN,
(CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY |
CSR_GP_CNTRL_REG_FLAG_GOING_TO_SLEEP), 50);
CSR_GP_CNTRL_REG_FLAG_GOING_TO_SLEEP), 15000);
if (ret < 0) {
IWL_ERR(priv, "MAC is in deep sleep!\n");
return -EIO;

7
drivers/net/wireless/iwlwifi/iwl3945-base.c
View File

@ -4941,6 +4941,7 @@ static void __iwl3945_down(struct iwl_priv *priv)
test_bit(STATUS_EXIT_PENDING, &priv->status) <<
STATUS_EXIT_PENDING;
priv->cfg->ops->lib->apm_ops.reset(priv);
spin_lock_irqsave(&priv->lock, flags);
iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
spin_unlock_irqrestore(&priv->lock, flags);
@ -4958,7 +4959,11 @@ static void __iwl3945_down(struct iwl_priv *priv)
udelay(5);
priv->cfg->ops->lib->apm_ops.reset(priv);
if (exit_pending || test_bit(STATUS_IN_SUSPEND, &priv->status))
priv->cfg->ops->lib->apm_ops.stop(priv);
else
priv->cfg->ops->lib->apm_ops.reset(priv);
exit:
memset(&priv->card_alive, 0, sizeof(struct iwl_alive_resp));