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[PATCH] ppc64: Don't panic when early __ioremap fails

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Early calls to __ioremap() will panic if the hash insertion fails. This
patch makes them return NULL instead. It happens with some pSeries users
who enabled CONFIG_BOOTX_TEXT. The later is getting an incorrect address
for the fame buffer and the hash insertion fails. With this patch, it
will display an error instead of crashing at boot.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Benjamin Herrenschmidt 2005-11-10 11:12:11 +11:00 committed by Paul Mackerras
parent c44bc68dc0
commit 77ac166fba
1 changed files with 5 additions and 2 deletions
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7
arch/powerpc/mm/pgtable_64.c
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@ -122,8 +122,11 @@ static int map_io_page(unsigned long ea, unsigned long pa, int flags)
*
*/
if (htab_bolt_mapping(ea, ea + PAGE_SIZE, pa, flags,
mmu_virtual_psize))
panic("Can't map bolted IO mapping");
mmu_virtual_psize)) {
printk(KERN_ERR "Failed to do bolted mapping IO "
"memory at %016lx !\n", pa);
return -ENOMEM;
}
}
return 0;
}