[PATCH 4.1 071/123] iwlwifi: pcie: prepare the device before accessing it

[Greg Kroah-Hartman]

4.1-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Emmanuel Grumbach <emmanuel.grumbach@xxxxxxxxx>

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@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 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.


--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/