linux-kernel - [PATCH 1/4] wifi: mwifiex: release firmware at remove time

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Message-Id: <20240826072648.167004-2-s.hauer@pengutronix.de>
Date: Mon, 26 Aug 2024 09:26:45 +0200
From: Sascha Hauer <s.hauer@...gutronix.de>
To: Francesco Dolcini <francesco@...cini.it>
Cc: Calvin Owens <calvin@...nvd.org>,
	Brian Norris <briannorris@...omium.org>,
	Kalle Valo <kvalo@...nel.org>,
	David Lin <yu-hao.lin@....com>,
	linux-wireless@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	kernel@...gutronix.de,
	Sascha Hauer <s.hauer@...gutronix.de>
Subject: [PATCH 1/4] wifi: mwifiex: release firmware at remove time

With VDLL support the device will request parts of the firmware during
runtime, so instead of releasing the firmware immediately after initial
firmware upload, release it during device deregistration.

FIXME: I am not sure if we run into trouble with the firmware framework
when we don't release the firmware. We might have to copy it over to
some private buffer instead of just keeping it around.

FIXME: we might want to limit the release firmware at remove time to the
devices that actually need it.

Signed-off-by: Sascha Hauer <s.hauer@...gutronix.de>
---
 drivers/net/wireless/marvell/mwifiex/main.c | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/drivers/net/wireless/marvell/mwifiex/main.c b/drivers/net/wireless/marvell/mwifiex/main.c
index 96d1f6039fbca..5d02277d35293 100644
--- a/drivers/net/wireless/marvell/mwifiex/main.c
+++ b/drivers/net/wireless/marvell/mwifiex/main.c
@@ -695,10 +695,6 @@ static int _mwifiex_fw_dpc(const struct firmware *firmware, void *context)
 		release_firmware(adapter->cal_data);
 		adapter->cal_data = NULL;
 	}
-	if (adapter->firmware) {
-		release_firmware(adapter->firmware);
-		adapter->firmware = NULL;
-	}
 	if (init_failed) {
 		if (adapter->irq_wakeup >= 0)
 			device_init_wakeup(adapter->dev, false);
@@ -1836,6 +1832,11 @@ int mwifiex_remove_card(struct mwifiex_adapter *adapter)
 		    "info: unregister device\n");
 	if (adapter->if_ops.unregister_dev)
 		adapter->if_ops.unregister_dev(adapter);
+	if (adapter->firmware) {
+		release_firmware(adapter->firmware);
+		adapter->firmware = NULL;
+	}
+
 	/* Free adapter structure */
 	mwifiex_dbg(adapter, INFO,
 		    "info: free adapter\n");
-- 
2.39.2