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Date: Mon, 30 Jul 2012 10:23:22 +0200
From: Takashi Iwai <tiwai@...e.de>
To: Daniel Mack <zonque@...il.com>
Cc: Fengguang Wu <fengguang.wu@...el.com>,
Krzysztof Helt <krzysztof.h1@...pl>,
LKML <linux-kernel@...r.kernel.org>,
Rene Herman <rene.herman@...il.com>,
alsa-devel@...a-project.org
Subject: Re: [PATCH] es1688 - freeup resources on init failure
At Sun, 29 Jul 2012 16:23:08 +0200,
Daniel Mack wrote:
>
> On 29.07.2012 13:39, Fengguang Wu wrote:
> >>> err = snd_es1688_init(chip, 1);
> >>> if (err < 0)
> >>> - return err;
> >>> + goto exit_release_dma;
> >>>
> >>> /* Register device */
> >>> return snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops);
> >>> +
> >>> +exit_release_dma:
> >>> + free_dma(chip->dma8);
> >>> +exit_release_irq:
> >>> + free_irq(chip->irq, chip);
> >>> +exit_release_region:
> >>> + release_and_free_resource(chip->res_port);
> >>> +exit:
> >>> + return err;
> >>
> >> You can simply call snd_es1688_free(chip) instead of a bunch of
> >> labels. That is, all goto's can be "goto exit", and
> >>
> >> exit:
> >> snd_es1688_free(chip);
> >> return err;
> >
> > snd_es1688_free() will call snd_es1688_init() which in turn use the
> > uninitialized spin locks and other data. So I end up with the below
> > patch. snd_device_new() could also return errors and will be handled
> > in the same way.
> >
> > I don't have the hardware, however tests show it at least fixed the
> > boot time irq mismatch warnings.
> >
> > Daniel, thanks for your initial implementation and please kindly
> > confirm the below 3rd version :)
>
> Looks good to me, but I don't have the hardware either :)
I see no obvious problem there so I took the patch now.
Thanks!
Takashi
>
>
> Daniel
>
>
> > ---
> > es1688 - freeup resources on init failure
> >
> > This will fix the following oops:
> >
> > [ 6.169981] genirq: Flags mismatch irq 5. 00000000 (ES1688) vs. 00000000 (ES1688)
> > [ 6.170851] Pid: 1, comm: swapper Not tainted 3.5.0-00004-gceee0e9 #14
> > [ 6.170851] Call Trace:
> > [ 6.170851] [<c1062237>] ? __setup_irq+0x3c7/0x420
> > [ 6.170851] [<c1062486>] ? request_threaded_irq+0x76/0x140
> > [ 6.170851] [<c1290220>] ? snd_es1688_ioctl+0x10/0x10
> > [ 6.170851] [<c10624c2>] ? request_threaded_irq+0xb2/0x140
> > [ 6.170851] [<c1291196>] ? snd_es1688_create+0x96/0x330
> > [ 6.170851] [<c138365d>] ? snd_gusextreme_probe+0x18d/0x5a2
> > [ 6.170851] [<c11c9d80>] ? __driver_attach+0x80/0x80
> > [ 6.170851] [<c10db22f>] ? sysfs_create_link+0xf/0x20
> > [ 6.170851] [<c11c9d80>] ? __driver_attach+0x80/0x80
> > [ 6.170851] [<c11d1502>] ? isa_bus_probe+0x12/0x20
> > [ 6.170851] [<c11c9b95>] ? driver_probe_device+0x55/0x1c0
> > [ 6.170851] [<c13ae04f>] ? _raw_spin_unlock+0xf/0x30
> > [ 6.170851] [<c13705ea>] ? klist_next+0x6a/0xe0
> > [ 6.170851] [<c11d15c1>] ? isa_bus_match+0x21/0x40
> > [ 6.170851] [<c11c8a24>] ? bus_for_each_drv+0x34/0x70
> > [ 6.170851] [<c11c9e4b>] ? device_attach+0x7b/0x90
> > [ 6.170851] [<c11c9d80>] ? __driver_attach+0x80/0x80
> > [ 6.170851] [<c11c8bff>] ? bus_probe_device+0x5f/0x80
> > [ 6.170851] [<c11c7493>] ? device_add+0x573/0x620
> > [ 6.170851] [<c1042820>] ? complete_all+0x40/0x60
> > [ 6.170851] [<c13ae08a>] ? _raw_spin_unlock_irqrestore+0x1a/0x30
> > [ 6.170851] [<c11d16c6>] ? isa_register_driver+0xb6/0x150
> > [ 6.170851] [<c15c9002>] ? alsa_card_gusmax_init+0xf/0xf
> > [ 6.170851] [<c15a99bc>] ? do_one_initcall+0x7f/0x12b
> > [ 6.170851] [<c15a9b7a>] ? kernel_init+0x112/0x1a9
> > [ 6.170851] [<c15a9423>] ? do_early_param+0x77/0x77
> > [ 6.170851] [<c15a9a68>] ? do_one_initcall+0x12b/0x12b
> > [ 6.170851] [<c13aefbe>] ? kernel_thread_helper+0x6/0xd
> > [ 6.190170] es1688: can't grab IRQ 5
> > [ 6.190613] genirq: Flags mismatch irq 5. 00000000 (ES1688) vs. 00000000 (ES1688)
> > [ 6.191566] Pid: 1, comm: swapper Not tainted 3.5.0-00004-gceee0e9 #14
> > [ 6.192394] Call Trace:
> > [ 6.192685] [<c1062237>] ? __setup_irq+0x3c7/0x420
> > [ 6.193342] [<c1062486>] ? request_threaded_irq+0x76/0x140
> > [ 6.194081] [<c1290220>] ? snd_es1688_ioctl+0x10/0x10
> > [ 6.194607] [<c10624c2>] ? request_threaded_irq+0xb2/0x140
> > [ 6.194607] [<c1291196>] ? snd_es1688_create+0x96/0x330
> > [ 6.194607] [<c138365d>] ? snd_gusextreme_probe+0x18d/0x5a2
> > [ 6.194607] [<c11c9d80>] ? __driver_attach+0x80/0x80
> > [ 6.194607] [<c10db22f>] ? sysfs_create_link+0xf/0x20
> > [ 6.194607] [<c11c9d80>] ? __driver_attach+0x80/0x80
> > [ 6.194607] [<c11d1502>] ? isa_bus_probe+0x12/0x20
> > [ 6.194607] [<c11c9b95>] ? driver_probe_device+0x55/0x1c0
> > [ 6.194607] [<c13ae04f>] ? _raw_spin_unlock+0xf/0x30
> > [ 6.194607] [<c13705ea>] ? klist_next+0x6a/0xe0
> > [ 6.194607] [<c11d15c1>] ? isa_bus_match+0x21/0x40
> > [ 6.194607] [<c11c8a24>] ? bus_for_each_drv+0x34/0x70
> > [ 6.194607] [<c11c9e4b>] ? device_attach+0x7b/0x90
> > [ 6.194607] [<c11c9d80>] ? __driver_attach+0x80/0x80
> > [ 6.194607] [<c11c8bff>] ? bus_probe_device+0x5f/0x80
> > [ 6.194607] [<c11c7493>] ? device_add+0x573/0x620
> > [ 6.194607] [<c1042820>] ? complete_all+0x40/0x60
> > [ 6.194607] [<c13ae08a>] ? _raw_spin_unlock_irqrestore+0x1a/0x30
> > [ 6.194607] [<c11d16c6>] ? isa_register_driver+0xb6/0x150
> > [ 6.194607] [<c15c9002>] ? alsa_card_gusmax_init+0xf/0xf
> > [ 6.194607] [<c15a99bc>] ? do_one_initcall+0x7f/0x12b
> > [ 6.194607] [<c15a9b7a>] ? kernel_init+0x112/0x1a9
> > [ 6.194607] [<c15a9423>] ? do_early_param+0x77/0x77
> > [ 6.194607] [<c15a9a68>] ? do_one_initcall+0x12b/0x12b
> > [ 6.194607] [<c13aefbe>] ? kernel_thread_helper+0x6/0xd
> > [ 6.210779] es1688: can't grab IRQ 5
> > [ 6.211305] gusextreme: probe of gusextreme.0 failed with error -16
> >
> > Signed-off-by: Daniel Mack <zonque@...il.com>
> > Signed-off-by: Fengguang Wu <fengguang.wu@...el.com>
> > ---
> > include/sound/es1688.h | 1
> > sound/isa/es1688/es1688_lib.c | 34 +++++++++++++++++++++-----------
> > 2 files changed, 24 insertions(+), 11 deletions(-)
> >
> > --- linux.orig/sound/isa/es1688/es1688_lib.c 2012-07-29 18:59:09.820640797 +0800
> > +++ linux/sound/isa/es1688/es1688_lib.c 2012-07-29 18:59:11.576640840 +0800
> > @@ -612,10 +612,10 @@ static int snd_es1688_capture_close(stru
> >
> > static int snd_es1688_free(struct snd_es1688 *chip)
> > {
> > - if (chip->res_port) {
> > + if (chip->hardware != ES1688_HW_UNDEF)
> > snd_es1688_init(chip, 0);
> > + if (chip->res_port)
> > release_and_free_resource(chip->res_port);
> > - }
> > if (chip->irq >= 0)
> > free_irq(chip->irq, (void *) chip);
> > if (chip->dma8 >= 0) {
> > @@ -657,19 +657,27 @@ int snd_es1688_create(struct snd_card *c
> > return -ENOMEM;
> > chip->irq = -1;
> > chip->dma8 = -1;
> > + chip->hardware = ES1688_HW_UNDEF;
> >
> > - if ((chip->res_port = request_region(port + 4, 12, "ES1688")) == NULL) {
> > + chip->res_port = request_region(port + 4, 12, "ES1688");
> > + if (chip->res_port == NULL) {
> > snd_printk(KERN_ERR "es1688: can't grab port 0x%lx\n", port + 4);
> > - return -EBUSY;
> > + err = -EBUSY;
> > + goto exit;
> > }
> > - if (request_irq(irq, snd_es1688_interrupt, 0, "ES1688", (void *) chip)) {
> > +
> > + err = request_irq(irq, snd_es1688_interrupt, 0, "ES1688", (void *) chip);
> > + if (err < 0) {
> > snd_printk(KERN_ERR "es1688: can't grab IRQ %d\n", irq);
> > - return -EBUSY;
> > + goto exit;
> > }
> > +
> > chip->irq = irq;
> > - if (request_dma(dma8, "ES1688")) {
> > + err = request_dma(dma8, "ES1688");
> > +
> > + if (err < 0) {
> > snd_printk(KERN_ERR "es1688: can't grab DMA8 %d\n", dma8);
> > - return -EBUSY;
> > + goto exit;
> > }
> > chip->dma8 = dma8;
> >
> > @@ -685,14 +693,18 @@ int snd_es1688_create(struct snd_card *c
> >
> > err = snd_es1688_probe(chip);
> > if (err < 0)
> > - return err;
> > + goto exit;
> >
> > err = snd_es1688_init(chip, 1);
> > if (err < 0)
> > - return err;
> > + goto exit;
> >
> > /* Register device */
> > - return snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops);
> > + err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops);
> > +exit:
> > + if (err)
> > + snd_es1688_free(chip);
> > + return err;
> > }
> >
> > static struct snd_pcm_ops snd_es1688_playback_ops = {
> > --- linux.orig/include/sound/es1688.h 2012-07-29 18:59:09.820640797 +0800
> > +++ linux/include/sound/es1688.h 2012-07-29 18:59:13.000640873 +0800
> > @@ -29,6 +29,7 @@
> > #define ES1688_HW_AUTO 0x0000
> > #define ES1688_HW_688 0x0001
> > #define ES1688_HW_1688 0x0002
> > +#define ES1688_HW_UNDEF 0x0003
> >
> > struct snd_es1688 {
> > unsigned long port; /* port of ESS chip */
> >
>
--
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