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powerpc/xive: Do not expose a debugfs file when XIVE is disabled

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The XIVE interrupt mode can be disabled with the "xive=off" kernel
parameter, in which case there is nothing to present to the user in the
associated /sys/kernel/debug/powerpc/xive file.

Fixes: 930914b7d5 ("powerpc/xive: Add a debugfs file to dump internal XIVE state")
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200429075122.1216388-4-clg@kaod.org
This commit is contained in:
Cédric Le Goater 2020-04-29 09:51:22 +02:00 committed by Michael Ellerman
parent a101950fcb
commit 0755e85570
1 changed files with 3 additions and 2 deletions
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5
arch/powerpc/sysdev/xive/common.c
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@ -1664,7 +1664,8 @@ DEFINE_SHOW_ATTRIBUTE(xive_core_debug);
int xive_core_debug_init(void)
{
debugfs_create_file("xive", 0400, powerpc_debugfs_root,
NULL, &xive_core_debug_fops);
if (xive_enabled())
debugfs_create_file("xive", 0400, powerpc_debugfs_root,
NULL, &xive_core_debug_fops);
return 0;
}