diff options
| author | Clemens Ladisch <clemens@ladisch.de> | 2011-09-04 22:17:38 +0200 |
|---|---|---|
| committer | Clemens Ladisch <clemens@ladisch.de> | 2013-10-20 22:07:57 +0200 |
| commit | 1b70485f135a39d5f2d8c392a16817456fa3a5cd (patch) | |
| tree | cf1b9b833619374c3169c368890652d53594b43d /sound/firewire/scs1x.c | |
| parent | ALSA: dice: optimize reading of consecutive registers (diff) | |
| download | linux-1b70485f135a39d5f2d8c392a16817456fa3a5cd.tar.xz linux-1b70485f135a39d5f2d8c392a16817456fa3a5cd.zip | |
ALSA: firewire: extend snd_fw_transaction()
Add a flag to snd_fw_transaction() to allow it to abort when a bus reset
happens. This removes most of the duplicated error handling loops that
were required around calls to the low-level fw_run_transaction().
Also add a flag to suppress error messages; errors are expected when we
attempt to clean up after the device was unplugged.
Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Diffstat (limited to 'sound/firewire/scs1x.c')
| -rw-r--r-- | sound/firewire/scs1x.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/sound/firewire/scs1x.c b/sound/firewire/scs1x.c index 505fc8123199..858023cf4298 100644 --- a/sound/firewire/scs1x.c +++ b/sound/firewire/scs1x.c @@ -369,7 +369,7 @@ static int scs_init_hss_address(struct scs *scs) data = cpu_to_be64(((u64)HSS1394_TAG_CHANGE_ADDRESS << 56) | scs->hss_handler.offset); err = snd_fw_transaction(scs->unit, TCODE_WRITE_BLOCK_REQUEST, - HSS1394_ADDRESS, &data, 8); + HSS1394_ADDRESS, &data, 8, 0); if (err < 0) dev_err(&scs->unit->device, "HSS1394 communication failed\n"); @@ -455,12 +455,16 @@ err_card: static void scs_update(struct fw_unit *unit) { struct scs *scs = dev_get_drvdata(&unit->device); + int generation; __be64 data; data = cpu_to_be64(((u64)HSS1394_TAG_CHANGE_ADDRESS << 56) | scs->hss_handler.offset); + generation = fw_parent_device(unit)->generation; + smp_rmb(); /* node_id vs. generation */ snd_fw_transaction(scs->unit, TCODE_WRITE_BLOCK_REQUEST, - HSS1394_ADDRESS, &data, 8); + HSS1394_ADDRESS, &data, 8, + FW_FIXED_GENERATION | generation); } static void scs_remove(struct fw_unit *unit) |