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loader: remove final sysfs codepath in loader_get_device_name_for_fd()

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Effectively everyone with actual hardware and/or requesting the
"device_name" requires a working libdrm. Thus they could/should already
be using the (now only) codepath.

Apart from the code simplification, we can slim down our configure.ac
even further. But that will be done in separate patch(es).

Cc: Gary Wong <gtw@gnu.org>
Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
Reviewed-by: Axel Davy <axel.davy@ens.fr>
Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com>
This commit is contained in:
Emil Velikov
2016-09-09 15:20:23 +01:00
committed by Emil Velikov
parent 4f1c33fd9d
commit f9f7e44c94
2 changed files with 5 additions and 62 deletions
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src/loader/loader.c
+1 -46
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@@ -282,7 +282,7 @@ int loader_get_user_preferred_fd(int default_fd, int *different_device)
}
#endif
#if defined(HAVE_SYSFS) || defined(HAVE_LIBDRM)
#if defined(HAVE_LIBDRM)
static int
dev_node_from_fd(int fd, unsigned int *maj, unsigned int *min)
{
@@ -346,47 +346,6 @@ loader_get_pci_id_for_fd(int fd, int *vendor_id, int *chip_id)
}
#if HAVE_SYSFS
static char *
sysfs_get_device_name_for_fd(int fd)
{
char *device_name = NULL;
unsigned int maj, min;
FILE *f;
char buf[0x40];
static const char match[9] = "\nDEVNAME=";
int expected = 1;
if (dev_node_from_fd(fd, &maj, &min) < 0)
return NULL;
snprintf(buf, sizeof(buf), "/sys/dev/char/%d:%d/uevent", maj, min);
if (!(f = fopen(buf, "r")))
return NULL;
while (expected < sizeof(match)) {
int c = getc(f);
if (c == EOF) {
fclose(f);
return NULL;
} else if (c == match[expected] )
expected++;
else
expected = 0;
}
strcpy(buf, "/dev/");
if (fgets(buf + 5, sizeof(buf) - 5, f)) {
buf[strcspn(buf, "\n")] = '\0';
device_name = strdup(buf);
}
fclose(f);
return device_name;
}
#endif
#if defined(HAVE_LIBDRM)
static char *
drm_get_device_name_for_fd(int fd)
@@ -411,10 +370,6 @@ loader_get_device_name_for_fd(int fd)
{
char *result = NULL;
#if HAVE_SYSFS
if ((result = sysfs_get_device_name_for_fd(fd)))
return result;
#endif
#if HAVE_LIBDRM
if ((result = drm_get_device_name_for_fd(fd)))
return result;