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authorGavin Shan <gwshan@linux.vnet.ibm.com>2017-02-16 10:22:32 +1100
committerMichael Ellerman <mpe@ellerman.id.au>2017-02-17 22:13:27 +1100
commit36c7c9da40c408a71e5e6bfe12e57dcf549a296d (patch)
treefb69c3eeea4a06eeb365f116f0620c1cd679d5ce /drivers/pci
parent6ae3f8ad2017079292cb49c8959b527bcbcbefed (diff)
pci/hotplug/pnv-php: Remove WARN_ON() in pnv_php_put_slot()
The WARN_ON() causes unnecessary backtrace when putting the parent slot, which is likely to be NULL. WARNING: CPU: 2 PID: 1071 at drivers/pci/hotplug/pnv_php.c:85 \ pnv_php_release+0xcc/0x150 [pnv_php] : Call Trace: [c0000003bc007c10] [d00000000ad613c4] pnv_php_release+0x144/0x150 [pnv_php] [c0000003bc007c40] [c0000000006641d8] pci_hp_deregister+0x238/0x330 [c0000003bc007cd0] [d00000000ad61440] pnv_php_unregister_one+0x70/0xa0 [pnv_php] [c0000003bc007d10] [d00000000ad614c0] pnv_php_unregister+0x50/0x80 [pnv_php] [c0000003bc007d40] [d00000000ad61e84] pnv_php_exit+0x50/0xcb4 [pnv_php] [c0000003bc007d70] [c00000000019499c] SyS_delete_module+0x1fc/0x2a0 [c0000003bc007e30] [c00000000000b184] system_call+0x38/0xe0 Cc: <stable@vger.kernel.org> # v4.8+ Fixes: 66725152fb9f ("PCI/hotplug: PowerPC PowerNV PCI hotplug driver") Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com> Reviewed-by: Andrew Donnellan <andrew.donnellan@au1.ibm.com> Tested-by: Vaibhav Jain <vaibhav@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'drivers/pci')
-rw-r--r--drivers/pci/hotplug/pnv_php.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/pci/hotplug/pnv_php.c b/drivers/pci/hotplug/pnv_php.c
index 63cd9f354b79..da1bbf3eda55 100644
--- a/drivers/pci/hotplug/pnv_php.c
+++ b/drivers/pci/hotplug/pnv_php.c
@@ -76,7 +76,7 @@ static void pnv_php_free_slot(struct kref *kref)
static inline void pnv_php_put_slot(struct pnv_php_slot *php_slot)
{
- if (WARN_ON(!php_slot))
+ if (!php_slot)
return;
kref_put(&php_slot->kref, pnv_php_free_slot);