From: Stanislaw Gruszka <sgruszka@redhat.com>
To: stable@vger.kernel.org
Subject: [PATCH 4.19] mt76: mt76x0u: do not reset radio on resume
Date: Wed, 4 Sep 2019 10:07:10 +0200 [thread overview]
Message-ID: <20190904080704.GA2704@redhat.com> (raw)
commit 8f2d163cb26da87e7d8e1677368b8ba1ba4d30b3 upstream.
On some machines mt76x0u firmware can hung during resume,
what result on messages like below:
[ 475.480062] mt76x0 1-8:1.0: Error: MCU response pre-completed!
[ 475.990066] mt76x0 1-8:1.0: Error: send MCU cmd failed:-110
[ 475.990075] mt76x0 1-8:1.0: Error: MCU response pre-completed!
[ 476.500003] mt76x0 1-8:1.0: Error: send MCU cmd failed:-110
[ 476.500012] mt76x0 1-8:1.0: Error: MCU response pre-completed!
[ 477.010046] mt76x0 1-8:1.0: Error: send MCU cmd failed:-110
[ 477.010055] mt76x0 1-8:1.0: Error: MCU response pre-completed!
[ 477.529997] mt76x0 1-8:1.0: Error: send MCU cmd failed:-110
[ 477.530006] mt76x0 1-8:1.0: Error: MCU response pre-completed!
[ 477.824907] mt76x0 1-8:1.0: Error: send MCU cmd failed:-71
[ 477.824916] mt76x0 1-8:1.0: Error: MCU response pre-completed!
[ 477.825029] usb 1-8: USB disconnect, device number 6
and possible whole system freeze.
This can be avoided, if we do not perform mt76x0_chip_onoff() reset.
Cc: stable@vger.kernel.org
Fixes: 134b2d0d1fcf ("mt76x0: init files")
Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
---
drivers/net/wireless/mediatek/mt76/mt76x0/init.c | 4 ++--
drivers/net/wireless/mediatek/mt76/mt76x0/mt76x0.h | 2 +-
drivers/net/wireless/mediatek/mt76/mt76x0/usb.c | 4 ++--
3 files changed, 5 insertions(+), 5 deletions(-)
diff --git a/drivers/net/wireless/mediatek/mt76/mt76x0/init.c b/drivers/net/wireless/mediatek/mt76/mt76x0/init.c
index 0a3e046d78db..da2ba51dec35 100644
--- a/drivers/net/wireless/mediatek/mt76/mt76x0/init.c
+++ b/drivers/net/wireless/mediatek/mt76/mt76x0/init.c
@@ -369,7 +369,7 @@ static void mt76x0_stop_hardware(struct mt76x0_dev *dev)
mt76x0_chip_onoff(dev, false, false);
}
-int mt76x0_init_hardware(struct mt76x0_dev *dev)
+int mt76x0_init_hardware(struct mt76x0_dev *dev, bool reset)
{
static const u16 beacon_offsets[16] = {
/* 512 byte per beacon */
@@ -382,7 +382,7 @@ int mt76x0_init_hardware(struct mt76x0_dev *dev)
dev->beacon_offsets = beacon_offsets;
- mt76x0_chip_onoff(dev, true, true);
+ mt76x0_chip_onoff(dev, true, reset);
ret = mt76x0_wait_asic_ready(dev);
if (ret)
diff --git a/drivers/net/wireless/mediatek/mt76/mt76x0/mt76x0.h b/drivers/net/wireless/mediatek/mt76/mt76x0/mt76x0.h
index fc9857f61771..f9dfe5097b09 100644
--- a/drivers/net/wireless/mediatek/mt76/mt76x0/mt76x0.h
+++ b/drivers/net/wireless/mediatek/mt76/mt76x0/mt76x0.h
@@ -279,7 +279,7 @@ void mt76x0_addr_wr(struct mt76x0_dev *dev, const u32 offset, const u8 *addr);
/* Init */
struct mt76x0_dev *mt76x0_alloc_device(struct device *dev);
-int mt76x0_init_hardware(struct mt76x0_dev *dev);
+int mt76x0_init_hardware(struct mt76x0_dev *dev, bool reset);
int mt76x0_register_device(struct mt76x0_dev *dev);
void mt76x0_cleanup(struct mt76x0_dev *dev);
void mt76x0_chip_onoff(struct mt76x0_dev *dev, bool enable, bool reset);
diff --git a/drivers/net/wireless/mediatek/mt76/mt76x0/usb.c b/drivers/net/wireless/mediatek/mt76/mt76x0/usb.c
index 54ae1f113be2..5aacb1f6a841 100644
--- a/drivers/net/wireless/mediatek/mt76/mt76x0/usb.c
+++ b/drivers/net/wireless/mediatek/mt76/mt76x0/usb.c
@@ -300,7 +300,7 @@ static int mt76x0_probe(struct usb_interface *usb_intf,
if (!(mt76_rr(dev, MT_EFUSE_CTRL) & MT_EFUSE_CTRL_SEL))
dev_warn(dev->mt76.dev, "Warning: eFUSE not present\n");
- ret = mt76x0_init_hardware(dev);
+ ret = mt76x0_init_hardware(dev, true);
if (ret)
goto err;
@@ -354,7 +354,7 @@ static int mt76x0_resume(struct usb_interface *usb_intf)
struct mt76x0_dev *dev = usb_get_intfdata(usb_intf);
int ret;
- ret = mt76x0_init_hardware(dev);
+ ret = mt76x0_init_hardware(dev, false);
if (ret)
return ret;
--
2.20.1
next reply other threads:[~2019-09-04 8:07 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-04 8:07 Stanislaw Gruszka [this message]
2019-09-04 11:59 ` [PATCH 4.19] mt76: mt76x0u: do not reset radio on resume Sasha Levin
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