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microblaze: warn if of_iomap() failed

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of_iomap() can return NULL. The function is void thus error propagation
is not possible but at least a WARN_ON() seems warranted here as a silent
failure might lead to a hard to understand system state.

Signed-off-by: Nicholas Mc Guire <hofrat@osadl.org>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
This commit is contained in:
Nicholas Mc Guire 2018-07-09 10:42:44 +02:00 committed by Michal Simek
parent 021c91791a
commit bd05a58ddf
1 changed files with 1 additions and 0 deletions
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arch/microblaze/pci/xilinx_pci.c
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@ -157,6 +157,7 @@ void __init xilinx_pci_init(void)
/* Set the max bus number to 255, and bus/subbus no's to 0 */
pci_reg = of_iomap(pci_node, 0);
WARN_ON(!pci_reg);
out_be32(pci_reg + XPLB_PCI_BUS, 0x000000ff);
iounmap(pci_reg);