Dne 19. 11. 19 v 13:40 Hans de Goede napsal(a):
Hi,
On 19-11-2019 13:23, Jaroslav Kysela wrote:
Dne 19. 11. 19 v 11:48 Hans de Goede napsal(a):
Prior to commit aba2260ae7b5 ("ucm: switch to ucm2 directory and v2 format, keep backward compatibility").
The filename build in parse_verb_file() was build like this: <prefix>/<uc_mgr->conf_file_name>/<file>
Where uc_mgr->conf_file_name would contain either the card_name or the card's longname depending on the detection of a longname based config in uc_mgr_import_master_config().
While the filename used in load_master_config() was build like this: <prefix>/<card_name>/<card_name>.conf
And uc_mgr_import_master_config() first calls load_master_config() with the card's longname and if that succeeds it overwrites uc_mgr->conf_file_name with the longname so that the subsequent uses of uc_mgr->conf_file_name in parse_verb_file() correctly use the longname.
But the new configuration_filename() helper added in commit aba2260ae7b5 _always_ builds the filename like this: <prefix>/<uc_mgr->conf_file_name>/<file><suffix>
This breaks the loading of the master-config by its longname, as when the longname is tried uc_mgr->conf_file_name still contains the card_name.
Hi Hans,
This new behaviour was intended for ucm2. I applied all four your patches, and added 10a63e093c4a98acfa9bcdfdd06938bcd874b008 on top which should keep the new behaviour for v2 configs.
Ah I see.
There is a bug in the commit you added on top though, when load_master_config() gets called with longname == 1 and ALSA_CONFIG_UCM2_VAR is not set and ALSA_CONFIG_UCM_VAR is set, then the if condition in the block is false, so it never executes:
if (getenv(ALSA_CONFIG_UCM2_VAR) || !getenv(ALSA_CONFIG_UCM_VAR)) {uc_mgr->conf_format = 2;configuration_filename(uc_mgr, filename, sizeof(filename),uc_mgr->conf_file_name, card_name, ".conf");}Causing the next block to also not execute:
if (uc_mgr->conf_format >= 2 && access(filename, R_OK) != 0) {/* try the old ucm directory */uc_mgr->conf_format = 1;configuration_filename(uc_mgr, filename, sizeof(filename),card_name, card_name, ".conf");if (access(filename, R_OK) != 0)return -ENOENT;}Causing load_master_config() to continue with an uninitialized filename.
I think you wanted the following condition for the second block:
if (uc_mgr->conf_format == 0 || access(filename, R_OK) != 0) {Also don't you want the same behavor wrt forcing the conf_format based on env. when trying the shortname ?
I think you can move the entire block under if (longname) to be unconditional, since conf_file_name == card_name for the shortname case using the longname path in the shortname case too is fine. Then you always call configuration_filename with conf_format set and all the handling for conf_format not being set (and for overriding it) can be dropped from configuration_filename() then.
Thanks again, fixed in 1d848ab739f0d207098627d2ba66421b3ec75eeb .
It's time to create the 1.2.1.1 bugfix alsa-lib release, I guess.
Yes that is a good idea (once the above is resolved).
The tar ball is in ftp://ftp.alsa-project.org/pub/testing .
Jaroslav
Regards,
Hans