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iwlwifi: pcie: extend device reset delay 

Newer hardware generations will take longer to be accessible again
after reset, so we need to wait longer before continuing any flow
that did a reset.

Rather than make the wait time configurable, simply extend it for
all.

Since all of these code paths can sleep, use usleep_range() rather
than mdelay().

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
This commit is contained in:
Johannes Berg 2016-04-13 10:24:59 +02:00 committed by Luca Coelho
parent fbbd48595f
commit b7a08b284d
1 changed files with 5 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
drivers/net/wireless/intel/iwlwifi/pcie/trans.c
View File

@ -360,8 +360,7 @@ static void iwl_pcie_apm_lp_xtal_enable(struct iwl_trans *trans)
/* Reset entire device - do controller reset (results in SHRD_HW_RST) */
iwl_set_bit(trans, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
udelay(10);
usleep_range(1000, 2000);
/*
* Set "initialization complete" bit to move adapter from
@ -407,8 +406,7 @@ static void iwl_pcie_apm_lp_xtal_enable(struct iwl_trans *trans)
* SHRD_HW_RST). Turn MAC off before proceeding.
*/
iwl_set_bit(trans, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
udelay(10);
usleep_range(1000, 2000);
/* Enable LP XTAL by indirect access through CSR */
apmg_gp1_reg = iwl_trans_pcie_read_shr(trans, SHR_APMG_GP1_REG);
@ -505,8 +503,7 @@ static void iwl_pcie_apm_stop(struct iwl_trans *trans, bool op_mode_leave)
/* Reset the entire device */
iwl_set_bit(trans, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
udelay(10);
usleep_range(1000, 2000);
/*
* Clear "initialization complete" bit to move adapter from
@ -1073,7 +1070,7 @@ static void _iwl_trans_pcie_stop_device(struct iwl_trans *trans, bool low_power)
/* stop and reset the on-board processor */
iwl_write32(trans, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
udelay(20);
usleep_range(1000, 2000);
/*
* Upon stop, the APM issues an interrupt if HW RF kill is set.
@ -1525,8 +1522,7 @@ static int _iwl_trans_pcie_start_hw(struct iwl_trans *trans, bool low_power)
/* Reset the entire device */
iwl_write32(trans, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
usleep_range(10, 15);
usleep_range(1000, 2000);
iwl_pcie_apm_init(trans);