Re: [PATCH -v2] PCI: update device mps when doing pci hotplug

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On 2013/8/6 15:23, Yijing Wang wrote:
> v1->v2: Update patch log, remove Joe's reported-by, because his problem
>         was mainly caused by BIOS incorrect setting. But this patch mainly
> 		to fix the bug caused by device hot add. Conservatively, this 
> 		version only update the mps problem when hot add. When the device
> 		mps < parent mps found, this patch try to update device mps.
> 		It seems unlikely device mps > parent mps after hot add device.
> 		So we don't care that situation.
> 
> This patch need to be applied to stable 3.4+

In this case...

> 
> Currently we don't update device's mps vaule when doing
> pci device hot-add. The hot-added device's mps will be set
> to default value (128B). But the upstream port device's mps
> may be larger than 128B which was set by firmware during
> system bootup. In this case the new added device may not
> work normally. This patch try to update the hot added device
> mps euqal to its parent mps, if device mpss < parent mps,
> print warning.
> 
> References: https://bugzilla.kernel.org/show_bug.cgi?id=60671
> Reported-by: Yijing Wang <wangyijing@xxxxxxxxxx>
> Signed-off-by: Yijing Wang <wangyijing@xxxxxxxxxx>
> Cc: Jon Mason <jdmason@xxxxxxxx>
> Cc: stable@xxxxxxxxxxxxxxx

The better tag is:

Cc: <stable@xxxxxxxxxxxxxxx> # 3.4+

Otherwise you won't be notified if it can be applied to the most recent
stable version but failed in older versions.

--
To unsubscribe from this list: send the line "unsubscribe stable" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html




[Index of Archives]     [Linux Kernel]     [Kernel Development Newbies]     [Linux USB Devel]     [Video for Linux]     [Linux Audio Users]     [Yosemite Hiking]     [Linux Kernel]     [Linux SCSI]