Messages in this thread Patch in this message | | | From | Jiri Slaby <> | Subject | [PATCH] OSS: mpu401, fix deadlock | Date | Mon, 29 Jun 2009 18:03:34 +0200 |
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If somebody cares about oss at all. -- mpu401_chk_version is called with a spin lock already held. Don't take it again.
Signed-off-by: Jiri Slaby <jirislaby@gmail.com> --- sound/oss/mpu401.c | 16 +++------------- 1 files changed, 3 insertions(+), 13 deletions(-)
diff --git a/sound/oss/mpu401.c b/sound/oss/mpu401.c index 6c0a770..1b2316f 100644 --- a/sound/oss/mpu401.c +++ b/sound/oss/mpu401.c @@ -926,31 +926,21 @@ static struct midi_operations mpu401_midi_operations[MAX_MIDI_DEV]; static void mpu401_chk_version(int n, struct mpu_config *devc) { int tmp; - unsigned long flags; devc->version = devc->revision = 0; - spin_lock_irqsave(&devc->lock,flags); - if ((tmp = mpu_cmd(n, 0xAC, 0)) < 0) - { - spin_unlock_irqrestore(&devc->lock,flags); + tmp = mpu_cmd(n, 0xAC, 0); + if (tmp < 0) return; - } if ((tmp & 0xf0) > 0x20) /* Why it's larger than 2.x ??? */ - { - spin_unlock_irqrestore(&devc->lock,flags); return; - } devc->version = tmp; - if ((tmp = mpu_cmd(n, 0xAD, 0)) < 0) - { + if ((tmp = mpu_cmd(n, 0xAD, 0)) < 0) { devc->version = 0; - spin_unlock_irqrestore(&devc->lock,flags); return; } devc->revision = tmp; - spin_unlock_irqrestore(&devc->lock,flags); } int attach_mpu401(struct address_info *hw_config, struct module *owner) -- 1.6.3.2
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