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s390/pci: fix sleeping in atomic during hotplug
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>
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@ -436,7 +436,7 @@ int clp_get_state(u32 fid, enum zpci_state *state)
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struct clp_state_data sd = {fid, ZPCI_FN_STATE_RESERVED};
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int rc;
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rrb = clp_alloc_block(GFP_KERNEL);
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rrb = clp_alloc_block(GFP_ATOMIC);
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if (!rrb)
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return -ENOMEM;
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