linux-kernel - [PATCH 4.4 80/96] ath10k: ignore configuring the incorrect board

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Date:   Tue, 28 Nov 2017 11:23:29 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Ryan Hsu <ryanhsu@....qualcomm.com>,
        Kalle Valo <kvalo@....qualcomm.com>,
        Sasha Levin <alexander.levin@...izon.com>
Subject: [PATCH 4.4 80/96] ath10k: ignore configuring the incorrect board_id

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

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

From: Ryan Hsu <ryanhsu@....qualcomm.com>


[ Upstream commit d2e202c06ca42d353d95df12437740921a6d05b5 ]

With command to get board_id from otp, in the case of following

  boot get otp board id result 0x00000000 board_id 0 chip_id 0
  boot using board name 'bus=pci,bmi-chip-id=0,bmi-board-id=0"
  ...
  failed to fetch board data for bus=pci,bmi-chip-id=0,bmi-board-id=0 from
  ath10k/QCA6174/hw3.0/board-2.bin

The invalid board_id=0 will be used as index to search in the board-2.bin.

Ignore the case with board_id=0, as it means the otp is not carrying
the board id information.

Signed-off-by: Ryan Hsu <ryanhsu@....qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@....qualcomm.com>
Signed-off-by: Sasha Levin <alexander.levin@...izon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/net/wireless/ath/ath10k/core.c |    5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

--- a/drivers/net/wireless/ath/ath10k/core.c
+++ b/drivers/net/wireless/ath/ath10k/core.c
@@ -548,8 +548,11 @@ static int ath10k_core_get_board_id_from
 		   "boot get otp board id result 0x%08x board_id %d chip_id %d\n",
 		   result, board_id, chip_id);
 
-	if ((result & ATH10K_BMI_BOARD_ID_STATUS_MASK) != 0)
+	if ((result & ATH10K_BMI_BOARD_ID_STATUS_MASK) != 0 ||
+	    (board_id == 0)) {
+		ath10k_warn(ar, "board id is not exist in otp, ignore it\n");
 		return -EOPNOTSUPP;
+	}
 
 	ar->id.bmi_ids_valid = true;
 	ar->id.bmi_board_id = board_id;