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doubletalk: probe failure causes OOPS

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The code bothers to probe for the device, but on failing to find it proceeds
to try and release a NULL resource, thereby ruining it's prior good
behaviour

Resolves-Bug: https://bugzilla.kernel.org/show_bug.cgi?id=88581
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
This commit is contained in:
Alan Cox 2014-12-15 11:33:08 +00:00 committed by Jiri Kosina
parent b69a7806de
commit 7aa4d5c8ff
1 changed files with 4 additions and 3 deletions
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1
drivers/staging/speakup/speakup_dtlk.c
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@ -361,6 +361,7 @@ static int synth_probe(struct spk_synth *synth)
port_val &= 0xfbff;
if (port_val != 0x107f) {
pr_info("DoubleTalk PC: not found\n");
if (synth_lpc)
synth_release_region(synth_lpc, SYNTH_IO_EXTENT);
return -ENODEV;
}