Patch "iwlwifi: pcie: prepare the device before accessing it" has been added to the 4.1-stable tree

Patch "iwlwifi: pcie: prepare the device before accessing it" has been added to the 4.1-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    iwlwifi: pcie: prepare the device before accessing it

to the 4.1-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     iwlwifi-pcie-prepare-the-device-before-accessing-it.patch
and it can be found in the queue-4.1 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From f9e5554cd8ca1d1212ec922755b397a20f737923 Mon Sep 17 00:00:00 2001
From: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Date: Thu, 4 Jun 2015 11:09:47 +0300
Subject: iwlwifi: pcie: prepare the device before accessing it

From: Emmanuel Grumbach <emmanuel.grumbach@intel.com>

commit f9e5554cd8ca1d1212ec922755b397a20f737923 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>

---
 drivers/net/wireless/iwlwifi/pcie/trans.c |    6 ++++++
 1 file changed, 6 insertions(+)

--- a/drivers/net/wireless/iwlwifi/pcie/trans.c
+++ b/drivers/net/wireless/iwlwifi/pcie/trans.c
@@ -2515,6 +2515,12 @@ struct iwl_trans *iwl_trans_pcie_alloc(s
 		trans->hw_rev = (trans->hw_rev & 0xfff0) |
 				(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
 		 * id located at the AUX bus MISC address space.


Patches currently in stable-queue which might be from emmanuel.grumbach@intel.com are

queue-4.1/iwlwifi-mvm-fix-antenna-selection-when-bt-is-active.patch
queue-4.1/iwlwifi-pcie-prepare-the-device-before-accessing-it.patch
queue-4.1/iwlwifi-nvm-remove-mac-address-byte-swapping-in-8000-family.patch