The patch below does not apply to the 6.6-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to stable@vger.kernel.org.

To reproduce the conflict and resubmit, you may use the following commands:

git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.6.y git checkout FETCH_HEAD git cherry-pick -x a2fad248947d702ed3dcb52b8377c1a3ae201e44 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to 'stable@vger.kernel.org' --in-reply-to '2025021050-canal-limeade-cac4@gregkh' --subject-prefix 'PATCH 6.6.y' HEAD^..

Possible dependencies:

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From a2fad248947d702ed3dcb52b8377c1a3ae201e44 Mon Sep 17 00:00:00 2001 From: Zijun Hu quic_zijuhu@quicinc.com Date: Mon, 13 Jan 2025 22:43:23 +0800 Subject: [PATCH] Bluetooth: qca: Fix poor RF performance for WCN6855

For WCN6855, board ID specific NVM needs to be downloaded once board ID is available, but the default NVM is always downloaded currently.

The wrong NVM causes poor RF performance, and effects user experience for several types of laptop with WCN6855 on the market.

Fix by downloading board ID specific NVM if board ID is available.

Fixes: 095327fede00 ("Bluetooth: hci_qca: Add support for QTI Bluetooth chip wcn6855") Cc: stable@vger.kernel.org # 6.4 Signed-off-by: Zijun Hu quic_zijuhu@quicinc.com Tested-by: Johan Hovold johan+linaro@kernel.org Reviewed-by: Johan Hovold johan+linaro@kernel.org Tested-by: Steev Klimaszewski steev@kali.org #Thinkpad X13s Signed-off-by: Luiz Augusto von Dentz luiz.von.dentz@intel.com

diff --git a/drivers/bluetooth/btqca.c b/drivers/bluetooth/btqca.c index a6b53d1f23db..cdf09d9a9ad2 100644 --- a/drivers/bluetooth/btqca.c +++ b/drivers/bluetooth/btqca.c @@ -909,8 +909,9 @@ int qca_uart_setup(struct hci_dev *hdev, uint8_t baudrate, "qca/msnv%02x.bin", rom_ver); break; case QCA_WCN6855: - snprintf(config.fwname, sizeof(config.fwname), - "qca/hpnv%02x.bin", rom_ver); + qca_read_fw_board_id(hdev, &boardid); + qca_get_nvm_name_by_board(config.fwname, sizeof(config.fwname), + "hpnv", soc_type, ver, rom_ver, boardid); break; case QCA_WCN7850: qca_get_nvm_name_by_board(config.fwname, sizeof(config.fwname),