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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>
This commit is contained in:
Sebastian Ott 2018-10-18 11:11:08 +02:00 committed by Martin Schwidefsky
parent 9594ca6b87
commit 98dfd32620
1 changed files with 1 additions and 1 deletions
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2
arch/s390/pci/pci_clp.c
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@ -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;