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powerpc/4xx: Don't unmap NULL mbase

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Signed-off-by: huhai <huhai@tj.kylinos.cn>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200521072648.1254699-1-mpe@ellerman.id.au
This commit is contained in:
huhai 2020-05-21 17:26:48 +10:00 committed by Michael Ellerman
parent 3aacaa719b
commit bcec081ecc
1 changed files with 1 additions and 3 deletions
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4
arch/powerpc/platforms/4xx/pci.c
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@ -1242,7 +1242,7 @@ static void __init ppc460sx_pciex_check_link(struct ppc4xx_pciex_port *port)
if (mbase == NULL) { if (mbase == NULL) {
printk(KERN_ERR "%pOF: Can't map internal config space !", printk(KERN_ERR "%pOF: Can't map internal config space !",
port->node); port->node);
goto done; return;
} }
while (attempt && (0 == (in_le32(mbase + PECFG_460SX_DLLSTA) while (attempt && (0 == (in_le32(mbase + PECFG_460SX_DLLSTA)
@ -1252,9 +1252,7 @@ static void __init ppc460sx_pciex_check_link(struct ppc4xx_pciex_port *port)
} }
if (attempt) if (attempt)
port->link = 1; port->link = 1;
done:
iounmap(mbase); iounmap(mbase);
} }
static struct ppc4xx_pciex_hwops ppc460sx_pcie_hwops __initdata = { static struct ppc4xx_pciex_hwops ppc460sx_pcie_hwops __initdata = {