4.20-stable review patch. If anyone has any objections, please let me know.
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From: Sebastian Ott sebott@linux.ibm.com
commit 98dfd32620e970eb576ebce5ea39d905cb005e72 upstream.
When triggered by pci hotplug (PEC 0x306) clp_get_state is called with spinlocks held resulting in the following warning:
zpci: n/a: Event 0x306 reconfigured PCI function 0x0 BUG: sleeping function called from invalid context at mm/page_alloc.c:4324 in_atomic(): 1, irqs_disabled(): 0, pid: 98, name: kmcheck 2 locks held by kmcheck/98:
Change the allocation to use GFP_ATOMIC.
Cc: stable@vger.kernel.org # 4.13+ Signed-off-by: Sebastian Ott sebott@linux.ibm.com Signed-off-by: Martin Schwidefsky schwidefsky@de.ibm.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- arch/s390/pci/pci_clp.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/arch/s390/pci/pci_clp.c +++ b/arch/s390/pci/pci_clp.c @@ -436,7 +436,7 @@ int clp_get_state(u32 fid, enum zpci_sta struct clp_state_data sd = {fid, ZPCI_FN_STATE_RESERVED}; int rc;
- rrb = clp_alloc_block(GFP_KERNEL); + rrb = clp_alloc_block(GFP_ATOMIC); if (!rrb) return -ENOMEM;