From d648a9bdac4b9705e48f0131a71f264eca8fd520 Mon Sep 17 00:00:00 2001 From: Sebastian Ott Date: Thu, 18 Oct 2018 11:11:08 +0200 Subject: [PATCH] s390/pci: fix sleeping in atomic during hotplug 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 Signed-off-by: Martin Schwidefsky Signed-off-by: Greg Kroah-Hartman --- arch/s390/pci/pci_clp.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/s390/pci/pci_clp.c b/arch/s390/pci/pci_clp.c index 19b2d2a..eeb7450 100644 --- 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_state *state) 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; -- 2.7.4