[Skiboot] [PATCH v3] pci: Avoid hot resets at boot time

Gavin Shan gwshan at linux.vnet.ibm.com
Wed Oct 12 16:35:38 AEDT 2016


On Wed, Oct 12, 2016 at 02:56:25PM +1100, Russell Currey wrote:
>In the PCI post-fundamental reset code, a hot reset is performed at the
>end.  This is causing issues at boot time as a reset signal is being sent
>downstream before the links are up, which is causing issues on adapters
>behind switches.  No errors result in skiboot, but the adapters are not
>usable in Linux as a result.
>
>Hot resets also occur in the FSP platform-specific code for conventional
>PCI slots, which could cause issues.
>
>This patch fixes some adapters not being configurable in Linux on some
>systems.  The issue was not present in skiboot 5.2.x.
>
>Cc: stable # 5.3.x
>Signed-off-by: Russell Currey <ruscur at russell.cc>

Acked-by: Gavin Shan <gwshan at linux.vnet.ibm.com>



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