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[01/19] staging: wfx: fix warning when unregister a frozen device

Message ID 20200515083325.378539-2-Jerome.Pouiller@silabs.com
State Not Applicable
Delegated to: David Miller
Headers show
Series staging: wfx: various fixes | expand

Commit Message

Jérôme Pouiller May 15, 2020, 8:33 a.m. UTC 
From: Jérôme Pouiller <jerome.pouiller@silabs.com>

The device does not answer to the command hif_shutdown. Therefore,
hif_shutdown() is a bit special. It bypasses some of work normally made
by wfx_cmd_send(). In particularly, it unlock hif_cmd.lock and
hif_cmd.key_renew_lock.

However, if the driver notice that the device is frozen, wfx_cmd_send()
stops to send data and doesn't lock the mutexes. Then, it produced a
warning when hif_shutdown() tried to unlock these mutexes.

Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
---
 drivers/staging/wfx/hif_tx.c | 2 ++
 1 file changed, 2 insertions(+)
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Patch

diff --git a/drivers/staging/wfx/hif_tx.c b/drivers/staging/wfx/hif_tx.c
index 7f459719e7b4..3e5d9111e855 100644
--- a/drivers/staging/wfx/hif_tx.c
+++ b/drivers/staging/wfx/hif_tx.c
@@ -131,6 +131,8 @@  int hif_shutdown(struct wfx_dev *wdev)
 	int ret;
 	struct hif_msg *hif;
 
+	if (wdev->chip_frozen)
+		return 0;
 	wfx_alloc_hif(0, &hif);
 	wfx_fill_header(hif, -1, HIF_REQ_ID_SHUT_DOWN, 0);
 	ret = wfx_cmd_send(wdev, hif, NULL, 0, true);