From af3076db14b1d143d53815bd37033a1b684ed6bc Mon Sep 17 00:00:00 2001
From: Lorenzo Bianconi <lorenzo@kernel.org>
Date: Thu, 5 Sep 2019 18:32:58 +0200
Subject: [PATCH] mt76: usb: add lockdep_assert_held in __mt76u_vendor_request
Git-commit: af3076db14b1d143d53815bd37033a1b684ed6bc
Patch-mainline: v5.5-rc1
References: jsc#SLE-13430
Introduce lockdep_assert_held macro in __mt76u_vendor_request routine
and remove comments regarding usb_ctrl_mtx lock
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
drivers/net/wireless/mediatek/mt76/usb.c | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)
diff --git a/drivers/net/wireless/mediatek/mt76/usb.c b/drivers/net/wireless/mediatek/mt76/usb.c
index 20c6fe510e9d..cac058fc41ef 100644
--- a/drivers/net/wireless/mediatek/mt76/usb.c
+++ b/drivers/net/wireless/mediatek/mt76/usb.c
@@ -15,7 +15,6 @@ static bool disable_usb_sg;
module_param_named(disable_usb_sg, disable_usb_sg, bool, 0644);
MODULE_PARM_DESC(disable_usb_sg, "Disable usb scatter-gather support");
-/* should be called with usb_ctrl_mtx locked */
static int __mt76u_vendor_request(struct mt76_dev *dev, u8 req,
u8 req_type, u16 val, u16 offset,
void *buf, size_t len)
@@ -24,6 +23,8 @@ static int __mt76u_vendor_request(struct mt76_dev *dev, u8 req,
unsigned int pipe;
int i, ret;
+ lockdep_assert_held(&dev->usb.usb_ctrl_mtx);
+
pipe = (req_type & USB_DIR_IN) ? usb_rcvctrlpipe(udev, 0)
: usb_sndctrlpipe(udev, 0);
for (i = 0; i < MT_VEND_REQ_MAX_RETRY; i++) {
@@ -60,7 +61,6 @@ int mt76u_vendor_request(struct mt76_dev *dev, u8 req,
}
EXPORT_SYMBOL_GPL(mt76u_vendor_request);
-/* should be called with usb_ctrl_mtx locked */
static u32 __mt76u_rr(struct mt76_dev *dev, u32 addr)
{
struct mt76_usb *usb = &dev->usb;
@@ -103,7 +103,6 @@ static u32 mt76u_rr(struct mt76_dev *dev, u32 addr)
return ret;
}
-/* should be called with usb_ctrl_mtx locked */
static void __mt76u_wr(struct mt76_dev *dev, u32 addr, u32 val)
{
struct mt76_usb *usb = &dev->usb;
--
2.16.4