From: Krishna Kumar <krishnak@linux.ibm.com>
To: mpe@ellerman.id.au, npiggin@gmail.com
Cc: linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org,
linux-pci@vger.kernel.org, brking@linux.vnet.ibm.com,
gbatra@linux.ibm.com, aneesh.kumar@kernel.org,
christophe.leroy@csgroup.eu, nathanl@linux.ibm.com,
bhelgaas@google.com, oohall@gmail.com,
tpearson@raptorengineering.com, mahesh.salgaonkar@in.ibm.com,
Krishna Kumar <krishnak@linux.ibm.com>
Subject: [PATCH 0/2] PCI hotplug driver fixes
Date: Thu, 9 May 2024 17:35:52 +0530 [thread overview]
Message-ID: <20240509120644.653577-1-krishnak@linux.ibm.com> (raw)
The fix of Powerpc hotplug driver (drivers/pci/hotplug/pnv_php.c)
addresses below two issues.
1. Kernel Crash during hot unplug of bridge/switch slot.
2. DPC-Support Enablement - Previously, when we do a hot-unplug
operation on a bridge slot, all the ports and devices behind the
bridge-ports would be hot-unplugged/offline, but when we do a hot-plug
operation on the same bridge slot, all the ports and devices behind the
bridge would not get hot-plugged/online. In this case, Only the first
port of the bridge gets enabled and the remaining port/devices remain
unplugged/offline. After the fix, The hot-unplug and hot-plug
operations on the slot associated with the bridge started behaving
correctly and became in sync. Now, after the hot plug operation on the
same slot, all the bridge ports and devices behind the bridge become
hot-plugged/online/restored in the same manner as it was before the
hot-unplug operation.
Krishna Kumar (2):
pci/hotplug/pnv_php: Fix hotplug driver crash on Powernv
arch/powerpc: hotplug driver bridge support
arch/powerpc/include/asm/ppc-pci.h | 4 +++
arch/powerpc/kernel/pci-hotplug.c | 5 ++--
arch/powerpc/kernel/pci_dn.c | 42 ++++++++++++++++++++++++++++++
drivers/pci/hotplug/pnv_php.c | 3 +--
4 files changed, 49 insertions(+), 5 deletions(-)
--
2.44.0
next reply other threads:[~2024-05-09 12:07 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-05-09 12:05 Krishna Kumar [this message]
2024-05-09 12:05 ` [PATCH 1/2] pci/hotplug/pnv_php: Fix hotplug driver crash on Powernv Krishna Kumar
2024-05-09 12:05 ` [PATCH 2/2] arch/powerpc: hotplug driver bridge support Krishna Kumar
2024-05-11 5:42 ` Andy Shevchenko
2024-05-14 12:05 ` krishna kumar
2024-05-13 9:45 ` Sourabh Jain
2024-05-14 12:08 ` krishna kumar
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