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[PATCH] swich attribute open() to simple stat()

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Here we switch to a simple stat() to recognize the file creation. This
will make it possible to wait for files, which are unreadable.

I've switched the timout back to 5 seconds cause the our /class/vc errors
seems like a bug in the vc layer not a sysfs delay.
This commit is contained in:
kay.sievers@vrfy.org 2004-10-15 19:45:56 -07:00 committed by Greg KH
parent 79db6912cf
commit 1946fec4de
1 changed files with 7 additions and 4 deletions
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11
wait_for_sysfs.c
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@ -47,7 +47,7 @@ void log_message(int level, const char *format, ...)
}
#endif
#define WAIT_MAX_SECONDS 10
#define WAIT_MAX_SECONDS 5
#define WAIT_LOOP_PER_SECOND 20
/* wait for specific file to show up, normally the "dev"-file */
@ -60,7 +60,7 @@ static int wait_for_class_device_attributes(struct sysfs_class_device *class_dev
{ .subsystem = "net", .file = "ifindex" },
{ .subsystem = "scsi_host", .file = "unique_id" },
{ .subsystem = "scsi_device", .file = NULL },
{ .subsystem = "pcmcia_socket", .file = NULL }, /* all files are unreadable in empty slot :( */
{ .subsystem = "pcmcia_socket", .file = "card_type" },
{ .subsystem = "usb_host", .file = NULL },
{ .subsystem = "bluetooth", .file = "address" },
{ .subsystem = "firmware", .file = "data" },
@ -86,11 +86,14 @@ static int wait_for_class_device_attributes(struct sysfs_class_device *class_dev
break;
}
}
dbg("looking at class '%s' for specific file '%s'", class_dev->classname, file);
dbg("looking at class '%s' for specific file '%s'", class_dev->classname, class_dev->path);
loop = WAIT_MAX_SECONDS * WAIT_LOOP_PER_SECOND;
while (--loop) {
if (sysfs_get_classdev_attr(class_dev, file) != NULL) {
struct stat stats;
if (stat(class_dev->path, &stats) == 0) {
dbg("class '%s' specific file '%s' found", class_dev->classname, file);
return 0;
}