From: wangxiaolei <xiaolei.wang@windriver.com>
To: Pavel Machek <pavel@denx.de>, Sasha Levin <sashal@kernel.org>
Cc: linux-kernel@vger.kernel.org, stable@vger.kernel.org,
Peter Chen <peter.chen@kernel.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
pawell@cadence.com, linux-usb@vger.kernel.org
Subject: Re: [PATCH AUTOSEL 5.15 10/19] usb: cdns3: Put the cdns set active part outside the spin lock
Date: Tue, 12 Sep 2023 10:39:10 +0800 [thread overview]
Message-ID: <6738b9d9-c172-8323-a144-79f7ae46bd0f@windriver.com> (raw)
In-Reply-To: <ZP7lIKUzD68XA91j@duo.ucw.cz>
On 9/11/23 6:00 PM, Pavel Machek wrote:
> Hi!
>
>> From: Xiaolei Wang <xiaolei.wang@windriver.com>
>>
>> [ Upstream commit 2319b9c87fe243327285f2fefd7374ffd75a65fc ]
>>
>> The device may be scheduled during the resume process,
>> so this cannot appear in atomic operations. Since
>> pm_runtime_set_active will resume suppliers, put set
>> active outside the spin lock, which is only used to
>> protect the struct cdns data structure, otherwise the
>> kernel will report the following warning:
> There's something wrong with this patch: cdns_set_active returns
> either void or int depending on config. That can't be intentional.
Thanks for the reminder, I will send a new patch to fix this problem
thanks
xiaolei
>
> Best regards,
> Pavel
>
>> +++ b/drivers/usb/cdns3/core.c
>> @@ -556,15 +555,23 @@ int cdns_resume(struct cdns *cdns, u8 set_active)
> ...
>> +
>> +void cdns_set_active(struct cdns *cdns, u8 set_active)
>> +{
>> + struct device *dev = cdns->dev;
>> +
>> if (set_active) {
>> pm_runtime_disable(dev);
>> pm_runtime_set_active(dev);
>> pm_runtime_enable(dev);
>> }
>>
>> - return 0;
>> + return;
>> }
>> +++ b/drivers/usb/cdns3/core.h
>> @@ -125,10 +125,13 @@ int cdns_init(struct cdns *cdns);
>> int cdns_remove(struct cdns *cdns);
>>
>> #ifdef CONFIG_PM_SLEEP
> ...
>> int cdns_suspend(struct cdns *cdns);
>> +void cdns_set_active(struct cdns *cdns, u8 set_active);
>> #else /* CONFIG_PM_SLEEP */
> ...
>> +static inline int cdns_set_active(struct cdns *cdns, u8 set_active)
>> { return 0; }
>> static inline int cdns_suspend(struct cdns *cdns)
>> { return 0; }
next prev parent reply other threads:[~2023-09-12 3:05 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-09-09 0:38 [PATCH AUTOSEL 5.15 01/19] media: dvb-usb-v2: af9035: Fix null-ptr-deref in af9035_i2c_master_xfer Sasha Levin
2023-09-09 0:38 ` [PATCH AUTOSEL 5.15 02/19] media: dw2102: Fix null-ptr-deref in dw2102_i2c_transfer() Sasha Levin
2023-09-09 0:38 ` [PATCH AUTOSEL 5.15 03/19] media: af9005: Fix null-ptr-deref in af9005_i2c_xfer Sasha Levin
2023-09-09 0:38 ` [PATCH AUTOSEL 5.15 04/19] media: anysee: fix null-ptr-deref in anysee_master_xfer Sasha Levin
2023-09-09 0:38 ` [PATCH AUTOSEL 5.15 05/19] media: az6007: Fix null-ptr-deref in az6007_i2c_xfer() Sasha Levin
2023-09-09 0:38 ` [PATCH AUTOSEL 5.15 06/19] media: dvb-usb-v2: gl861: Fix null-ptr-deref in gl861_i2c_master_xfer Sasha Levin
2023-09-09 0:38 ` [PATCH AUTOSEL 5.15 07/19] iio: core: Use min() instead of min_t() to make code more robust Sasha Levin
2023-09-09 0:38 ` [PATCH AUTOSEL 5.15 08/19] media: tuners: qt1010: replace BUG_ON with a regular error Sasha Levin
2023-09-09 0:38 ` [PATCH AUTOSEL 5.15 09/19] media: pci: cx23885: replace BUG with error return Sasha Levin
2023-09-09 0:38 ` [PATCH AUTOSEL 5.15 10/19] usb: cdns3: Put the cdns set active part outside the spin lock Sasha Levin
2023-09-11 10:00 ` Pavel Machek
2023-09-12 2:39 ` wangxiaolei [this message]
2023-09-09 0:38 ` [PATCH AUTOSEL 5.15 11/19] usb: gadget: fsl_qe_udc: validate endpoint index for ch9 udc Sasha Levin
2023-09-09 9:17 ` Sergey Shtylyov
2023-09-09 0:38 ` [PATCH AUTOSEL 5.15 12/19] tools: iio: iio_generic_buffer: Fix some integer type and calculation Sasha Levin
2023-09-09 0:38 ` [PATCH AUTOSEL 5.15 13/19] scsi: target: iscsi: Fix buffer overflow in lio_target_nacl_info_show() Sasha Levin
2023-09-09 0:38 ` [PATCH AUTOSEL 5.15 14/19] serial: cpm_uart: Avoid suspicious locking Sasha Levin
2023-09-09 0:38 ` [PATCH AUTOSEL 5.15 15/19] workqueue: Call wq_update_unbound_numa() on all CPUs in NUMA node on CPU hotplug Sasha Levin
2023-09-09 0:39 ` [PATCH AUTOSEL 5.15 16/19] usb: ehci: add workaround for chipidea PORTSC.PEC bug Sasha Levin
2023-09-09 0:39 ` [PATCH AUTOSEL 5.15 17/19] media: pci: ipu3-cio2: Initialise timing struct to avoid a compiler warning Sasha Levin
2023-09-09 0:39 ` [PATCH AUTOSEL 5.15 18/19] kobject: Add sanity check for kset->kobj.ktype in kset_register() Sasha Levin
2023-09-09 0:39 ` [PATCH AUTOSEL 5.15 19/19] interconnect: Fix locking for runpm vs reclaim Sasha Levin
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