[PATCH 1/2] ALSA: Fix synchronize_irq() bugs, redundancies

From: Jeff Garzik
Date: Mon Apr 21 2008 - 19:34:29 EST

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free_irq() calls synchronize_irq() for you, so there is no need for
drivers to manually do the same thing (again). Thus, calls where
sync-irq immediately precedes free-irq can be simplified.

However, during this audit several bugs were noticed, where free-irq is
preceded by a "irq >= 0" check... but the sync-irq call is not covered
by the same check.

So, where sync-irq could not be eliminated completely, the missing check
was added.

Signed-off-by: Jeff Garzik <jgarzik@xxxxxxxxxx>
---
drivers/media/video/cx88/cx88-alsa.c | 4 +---
drivers/media/video/saa7134/saa7134-alsa.c | 4 +---
sound/pci/ad1889.c | 2 --
sound/pci/ali5451/ali5451.c | 4 +---
sound/pci/atiixp.c | 2 +-
sound/pci/atiixp_modem.c | 2 +-
sound/pci/au88x0/au88x0.c | 2 --
sound/pci/azt3328.c | 3 ++-
sound/pci/cmipci.c | 2 --
sound/pci/ens1370.c | 3 ++-
sound/pci/es1938.c | 5 +----
sound/pci/es1968.c | 3 ++-
sound/pci/hda/hda_intel.c | 5 +----
sound/pci/ice1712/ice1712.c | 5 ++---
sound/pci/ice1712/ice1724.c | 4 +---
sound/pci/intel8x0.c | 3 +--
sound/pci/intel8x0m.c | 3 ++-
sound/pci/maestro3.c | 4 +---
sound/pci/oxygen/oxygen_lib.c | 4 +---
sound/pci/sis7019.c | 1 -
sound/pci/via82xx.c | 2 +-
sound/pci/via82xx_modem.c | 2 +-
22 files changed, 23 insertions(+), 46 deletions(-)

diff --git a/drivers/media/video/cx88/cx88-alsa.c b/drivers/media/video/cx88/cx88-alsa.c
index 316b106..03feb5b 100644
--- a/drivers/media/video/cx88/cx88-alsa.c
+++ b/drivers/media/video/cx88/cx88-alsa.c
@@ -690,10 +690,8 @@ MODULE_DEVICE_TABLE(pci, cx88_audio_pci_tbl);
static int snd_cx88_free(snd_cx88_card_t *chip)
{

- if (chip->irq >= 0){
- synchronize_irq(chip->irq);
+ if (chip->irq >= 0)
free_irq(chip->irq, chip);
- }

cx88_core_put(chip->core,chip->pci);

diff --git a/drivers/media/video/saa7134/saa7134-alsa.c b/drivers/media/video/saa7134/saa7134-alsa.c
index 047add8..ec6bdb9 100644
--- a/drivers/media/video/saa7134/saa7134-alsa.c
+++ b/drivers/media/video/saa7134/saa7134-alsa.c
@@ -954,10 +954,8 @@ static void snd_saa7134_free(struct snd_card * card)
if (chip->dev->dmasound.priv_data == NULL)
return;

- if (chip->irq >= 0) {
- synchronize_irq(chip->irq);
+ if (chip->irq >= 0)
free_irq(chip->irq, &chip->dev->dmasound);
- }

chip->dev->dmasound.priv_data = NULL;

diff --git a/sound/pci/ad1889.c b/sound/pci/ad1889.c
index a66d515..8d65ef6 100644
--- a/sound/pci/ad1889.c
+++ b/sound/pci/ad1889.c
@@ -854,8 +854,6 @@ snd_ad1889_free(struct snd_ad1889 *chip)

spin_unlock_irq(&chip->lock);

- synchronize_irq(chip->irq);
-
if (chip->irq >= 0)
free_irq(chip->irq, chip);

diff --git a/sound/pci/ali5451/ali5451.c b/sound/pci/ali5451/ali5451.c
index 6a905ed..01d133c 100644
--- a/sound/pci/ali5451/ali5451.c
+++ b/sound/pci/ali5451/ali5451.c
@@ -2047,10 +2047,8 @@ static int snd_ali_free(struct snd_ali * codec)
{
if (codec->hw_initialized)
snd_ali_disable_address_interrupt(codec);
- if (codec->irq >= 0) {
- synchronize_irq(codec->irq);
+ if (codec->irq >= 0)
free_irq(codec->irq, codec);
- }
if (codec->port)
pci_release_regions(codec->pci);
pci_disable_device(codec->pci);
diff --git a/sound/pci/atiixp.c b/sound/pci/atiixp.c
index 4594186..457228f 100644
--- a/sound/pci/atiixp.c
+++ b/sound/pci/atiixp.c
@@ -1553,7 +1553,7 @@ static int snd_atiixp_free(struct atiixp *chip)
if (chip->irq < 0)
goto __hw_end;
snd_atiixp_chip_stop(chip);
- synchronize_irq(chip->irq);
+
__hw_end:
if (chip->irq >= 0)
free_irq(chip->irq, chip);
diff --git a/sound/pci/atiixp_modem.c b/sound/pci/atiixp_modem.c
index a67a869..d457a32 100644
--- a/sound/pci/atiixp_modem.c
+++ b/sound/pci/atiixp_modem.c
@@ -1197,7 +1197,7 @@ static int snd_atiixp_free(struct atiixp_modem *chip)
if (chip->irq < 0)
goto __hw_end;
snd_atiixp_chip_stop(chip);
- synchronize_irq(chip->irq);
+
__hw_end:
if (chip->irq >= 0)
free_irq(chip->irq, chip);
diff --git a/sound/pci/au88x0/au88x0.c b/sound/pci/au88x0/au88x0.c
index 26819e2..68368e4 100644
--- a/sound/pci/au88x0/au88x0.c
+++ b/sound/pci/au88x0/au88x0.c
@@ -126,7 +126,6 @@ static int snd_vortex_dev_free(struct snd_device *device)
vortex_gameport_unregister(vortex);
vortex_core_shutdown(vortex);
// Take down PCI interface.
- synchronize_irq(vortex->irq);
free_irq(vortex->irq, vortex);
iounmap(vortex->mmio);
pci_release_regions(vortex->pci_dev);
@@ -220,7 +219,6 @@ snd_vortex_create(struct snd_card *card, struct pci_dev *pci, vortex_t ** rchip)
return 0;

alloc_out:
- synchronize_irq(chip->irq);
free_irq(chip->irq, chip);
irq_out:
vortex_core_shutdown(chip);
diff --git a/sound/pci/azt3328.c b/sound/pci/azt3328.c
index 4e71a55..c28fbaa 100644
--- a/sound/pci/azt3328.c
+++ b/sound/pci/azt3328.c
@@ -1514,7 +1514,8 @@ snd_azf3328_free(struct snd_azf3328 *chip)
/* well, at least we know how to disable the timer IRQ */
snd_azf3328_codec_outb(chip, IDX_IO_TIMER_VALUE + 3, 0x00);

- synchronize_irq(chip->irq);
+ if (chip->irq >= 0)
+ synchronize_irq(chip->irq);
__end_hw:
snd_azf3328_free_joystick(chip);
if (chip->irq >= 0)
diff --git a/sound/pci/cmipci.c b/sound/pci/cmipci.c
index 135f308..342dab3 100644
--- a/sound/pci/cmipci.c
+++ b/sound/pci/cmipci.c
@@ -2932,8 +2932,6 @@ static int snd_cmipci_free(struct cmipci *cm)
/* reset mixer */
snd_cmipci_mixer_write(cm, 0, 0);

- synchronize_irq(cm->irq);
-
free_irq(cm->irq, cm);
}

diff --git a/sound/pci/ens1370.c b/sound/pci/ens1370.c
index 72d85a5..09652f3 100644
--- a/sound/pci/ens1370.c
+++ b/sound/pci/ens1370.c
@@ -1910,7 +1910,8 @@ static int snd_ensoniq_free(struct ensoniq *ensoniq)
outl(0, ES_REG(ensoniq, CONTROL)); /* switch everything off */
outl(0, ES_REG(ensoniq, SERIAL)); /* clear serial interface */
#endif
- synchronize_irq(ensoniq->irq);
+ if (ensoniq->irq >= 0)
+ synchronize_irq(ensoniq->irq);
pci_set_power_state(ensoniq->pci, 3);
__hw_end:
#ifdef CHIP1370
diff --git a/sound/pci/es1938.c b/sound/pci/es1938.c
index 1a314fa..84fac1f 100644
--- a/sound/pci/es1938.c
+++ b/sound/pci/es1938.c
@@ -1488,7 +1488,6 @@ static int es1938_suspend(struct pci_dev *pci, pm_message_t state)

outb(0x00, SLIO_REG(chip, IRQCONTROL)); /* disable irqs */
if (chip->irq >= 0) {
- synchronize_irq(chip->irq);
free_irq(chip->irq, chip);
chip->irq = -1;
}
@@ -1578,10 +1577,8 @@ static int snd_es1938_free(struct es1938 *chip)

snd_es1938_free_gameport(chip);

- if (chip->irq >= 0) {
- synchronize_irq(chip->irq);
+ if (chip->irq >= 0)
free_irq(chip->irq, chip);
- }
pci_release_regions(chip->pci);
pci_disable_device(chip->pci);
kfree(chip);
diff --git a/sound/pci/es1968.c b/sound/pci/es1968.c
index 7d911a1..3e294b6 100644
--- a/sound/pci/es1968.c
+++ b/sound/pci/es1968.c
@@ -2456,7 +2456,8 @@ static inline void snd_es1968_free_gameport(struct es1968 *chip) { }
static int snd_es1968_free(struct es1968 *chip)
{
if (chip->io_port) {
- synchronize_irq(chip->irq);
+ if (chip->irq >= 0)
+ synchronize_irq(chip->irq);
outw(1, chip->io_port + 0x04); /* clear WP interrupts */
outw(0, chip->io_port + ESM_PORT_HOST_IRQ); /* disable IRQ */
}
diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c
index 4be36c8..ddf6e9c 100644
--- a/sound/pci/hda/hda_intel.c
+++ b/sound/pci/hda/hda_intel.c
@@ -1593,7 +1593,6 @@ static int azx_suspend(struct pci_dev *pci, pm_message_t state)
snd_hda_suspend(chip->bus, state);
azx_stop_chip(chip);
if (chip->irq >= 0) {
- synchronize_irq(chip->irq);
free_irq(chip->irq, chip);
chip->irq = -1;
}
@@ -1648,10 +1647,8 @@ static int azx_free(struct azx *chip)
azx_stop_chip(chip);
}

- if (chip->irq >= 0) {
- synchronize_irq(chip->irq);
+ if (chip->irq >= 0)
free_irq(chip->irq, (void*)chip);
- }
if (chip->msi)
pci_disable_msi(chip->pci);
if (chip->remap_addr)
diff --git a/sound/pci/ice1712/ice1712.c b/sound/pci/ice1712/ice1712.c
index df292af..fb13248 100644
--- a/sound/pci/ice1712/ice1712.c
+++ b/sound/pci/ice1712/ice1712.c
@@ -2482,10 +2482,9 @@ static int snd_ice1712_free(struct snd_ice1712 *ice)
outb(0xff, ICEREG(ice, IRQMASK));
/* --- */
__hw_end:
- if (ice->irq >= 0) {
- synchronize_irq(ice->irq);
+ if (ice->irq >= 0)
free_irq(ice->irq, ice);
- }
+
if (ice->port)
pci_release_regions(ice->pci);
snd_ice1712_akm4xxx_free(ice);
diff --git a/sound/pci/ice1712/ice1724.c b/sound/pci/ice1712/ice1724.c
index f533850..50bb140 100644
--- a/sound/pci/ice1712/ice1724.c
+++ b/sound/pci/ice1712/ice1724.c
@@ -2169,10 +2169,8 @@ static int snd_vt1724_free(struct snd_ice1712 *ice)
outb(0xff, ICEREG1724(ice, IRQMASK));
/* --- */
__hw_end:
- if (ice->irq >= 0) {
- synchronize_irq(ice->irq);
+ if (ice->irq >= 0)
free_irq(ice->irq, ice);
- }
pci_release_regions(ice->pci);
snd_ice1712_akm4xxx_free(ice);
pci_disable_device(ice->pci);
diff --git a/sound/pci/intel8x0.c b/sound/pci/intel8x0.c
index c52abd0..3e19504 100644
--- a/sound/pci/intel8x0.c
+++ b/sound/pci/intel8x0.c
@@ -2446,7 +2446,7 @@ static int snd_intel8x0_free(struct intel8x0 *chip)
pci_write_config_dword(chip->pci, 0x4c, val);
}
/* --- */
- synchronize_irq(chip->irq);
+
__hw_end:
if (chip->irq >= 0)
free_irq(chip->irq, chip);
@@ -2495,7 +2495,6 @@ static int intel8x0_suspend(struct pci_dev *pci, pm_message_t state)
chip->sdm_saved = igetbyte(chip, ICHREG(SDM));

if (chip->irq >= 0) {
- synchronize_irq(chip->irq);
free_irq(chip->irq, chip);
chip->irq = -1;
}
diff --git a/sound/pci/intel8x0m.c b/sound/pci/intel8x0m.c
index cadda8d..15db810 100644
--- a/sound/pci/intel8x0m.c
+++ b/sound/pci/intel8x0m.c
@@ -986,7 +986,8 @@ static int snd_intel8x0_free(struct intel8x0m *chip)
for (i = 0; i < chip->bdbars_count; i++)
iputbyte(chip, ICH_REG_OFF_CR + chip->ichd[i].reg_offset, ICH_RESETREGS);
/* --- */
- synchronize_irq(chip->irq);
+ if (chip->irq >= 0)
+ synchronize_irq(chip->irq);
__hw_end:
if (chip->bdbars.area)
snd_dma_free_pages(&chip->bdbars);
diff --git a/sound/pci/maestro3.c b/sound/pci/maestro3.c
index 04fa0a6..9aa8f05 100644
--- a/sound/pci/maestro3.c
+++ b/sound/pci/maestro3.c
@@ -2542,10 +2542,8 @@ static int snd_m3_free(struct snd_m3 *chip)
vfree(chip->suspend_mem);
#endif

- if (chip->irq >= 0) {
- synchronize_irq(chip->irq);
+ if (chip->irq >= 0)
free_irq(chip->irq, chip);
- }

if (chip->iobase)
pci_release_regions(chip->pci);
diff --git a/sound/pci/oxygen/oxygen_lib.c b/sound/pci/oxygen/oxygen_lib.c
index 78c2115..15b517e 100644
--- a/sound/pci/oxygen/oxygen_lib.c
+++ b/sound/pci/oxygen/oxygen_lib.c
@@ -388,10 +388,8 @@ static void oxygen_card_free(struct snd_card *card)
oxygen_write16(chip, OXYGEN_DMA_STATUS, 0);
oxygen_write16(chip, OXYGEN_INTERRUPT_MASK, 0);
spin_unlock_irq(&chip->reg_lock);
- if (chip->irq >= 0) {
+ if (chip->irq >= 0)
free_irq(chip->irq, chip);
- synchronize_irq(chip->irq);
- }
flush_scheduled_work();
chip->model->cleanup(chip);
mutex_destroy(&chip->mutex);
diff --git a/sound/pci/sis7019.c b/sound/pci/sis7019.c
index dcd7cd0..d888293 100644
--- a/sound/pci/sis7019.c
+++ b/sound/pci/sis7019.c
@@ -1194,7 +1194,6 @@ static int sis_suspend(struct pci_dev *pci, pm_message_t state)
/* snd_pcm_suspend_all() stopped all channels, so we're quiescent.
*/
if (sis->irq >= 0) {
- synchronize_irq(sis->irq);
free_irq(sis->irq, sis);
sis->irq = -1;
}
diff --git a/sound/pci/via82xx.c b/sound/pci/via82xx.c
index a756be6..b585cc3 100644
--- a/sound/pci/via82xx.c
+++ b/sound/pci/via82xx.c
@@ -2236,7 +2236,7 @@ static int snd_via82xx_free(struct via82xx *chip)
/* disable interrupts */
for (i = 0; i < chip->num_devs; i++)
snd_via82xx_channel_reset(chip, &chip->devs[i]);
- synchronize_irq(chip->irq);
+
if (chip->irq >= 0)
free_irq(chip->irq, chip);
__end_hw:
diff --git a/sound/pci/via82xx_modem.c b/sound/pci/via82xx_modem.c
index f5df1c7..31f64ee 100644
--- a/sound/pci/via82xx_modem.c
+++ b/sound/pci/via82xx_modem.c
@@ -1075,7 +1075,7 @@ static int snd_via82xx_free(struct via82xx_modem *chip)
/* disable interrupts */
for (i = 0; i < chip->num_devs; i++)
snd_via82xx_channel_reset(chip, &chip->devs[i]);
- synchronize_irq(chip->irq);
+
__end_hw:
if (chip->irq >= 0)
free_irq(chip->irq, chip);
--
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Next in thread: Jeff Garzik: "[PATCH 2/2] drivers/net: Fix synchronize_irq() bugs, redundancies"
Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]