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iwlwifi: pcie: prepare the device before accessing it

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commit f9e5554cd8 upstream.

For 8000 series, we need to access the device to know what
firmware to load. Before we do so, we need to prepare the
device otherwise we might not be able to access the
hardware.

Fixes: c278754a21e6 ("iwlwifi: mvm: support family 8000 B2/C steps")
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Emmanuel Grumbach
2015-06-04 11:09:47 +03:00
committed by Greg Kroah-Hartman
parent a8bc0fe729
commit 5c5aba569e
1 changed files with 6 additions and 0 deletions
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6
drivers/net/wireless/iwlwifi/pcie/trans.c
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@@ -2515,6 +2515,12 @@ struct iwl_trans *iwl_trans_pcie_alloc(struct pci_dev *pdev,
trans->hw_rev = (trans->hw_rev & 0xfff0) | trans->hw_rev = (trans->hw_rev & 0xfff0) |
(CSR_HW_REV_STEP(trans->hw_rev << 2) << 2); (CSR_HW_REV_STEP(trans->hw_rev << 2) << 2);
ret = iwl_pcie_prepare_card_hw(trans);
if (ret) {
IWL_WARN(trans, "Exit HW not ready\n");
goto out_pci_disable_msi;
}
/* /*
* in-order to recognize C step driver should read chip version * in-order to recognize C step driver should read chip version
* id located at the AUX bus MISC address space. * id located at the AUX bus MISC address space.