aboutsummaryrefslogtreecommitdiff
path: root/drivers/media
diff options
context:
space:
mode:
authorMike Isely <isely@pobox.com>2009-10-12 00:21:20 -0300
committerMauro Carvalho Chehab <mchehab@redhat.com>2009-12-05 18:40:59 -0200
commit271081475427f7d1acf5f8cdc51fc70afe662b17 (patch)
treec51e3991c4f42eff8be4e16cde0cec71ff96e129 /drivers/media
parent1b33185f5d944092576fc6562a842c603a2570d6 (diff)
downloadlinux-2.6.38-lt-ux500-271081475427f7d1acf5f8cdc51fc70afe662b17.tar.gz
V4L/DVB (13224): pvrusb2: Improve diagnostic info on driver initialization failure
It used to be that the only real detectable reason for the driver to fail during initialization would be that if the hardware is simply jammed. However with the advent of the sub-device mechanism in V4L it is possible now to detect if a sub-device module fails to load successfully. The pvrusb2 driver does in fact react to this by also (correctly) failing, however the original diagnostic message "hardware is jammed" was still being reported. This misleads the user because in fact it might not actually be a hardware failure. This change adds logic to tell the difference and then report a more appropriate message to the kernel log. Signed-off-by: Mike Isely <isely@pobox.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media')
-rw-r--r--drivers/media/video/pvrusb2/pvrusb2-hdw-internal.h1
-rw-r--r--drivers/media/video/pvrusb2/pvrusb2-hdw.c28
2 files changed, 25 insertions, 4 deletions
diff --git a/drivers/media/video/pvrusb2/pvrusb2-hdw-internal.h b/drivers/media/video/pvrusb2/pvrusb2-hdw-internal.h
index 5b152ff20bd..9098494ae59 100644
--- a/drivers/media/video/pvrusb2/pvrusb2-hdw-internal.h
+++ b/drivers/media/video/pvrusb2/pvrusb2-hdw-internal.h
@@ -270,6 +270,7 @@ struct pvr2_hdw {
int force_dirty; /* consider all controls dirty if true */
int flag_ok; /* device in known good state */
+ int flag_modulefail; /* true if at least one module failed to load */
int flag_disconnected; /* flag_ok == 0 due to disconnect */
int flag_init_ok; /* true if structure is fully initialized */
int fw1_state; /* current situation with fw1 */
diff --git a/drivers/media/video/pvrusb2/pvrusb2-hdw.c b/drivers/media/video/pvrusb2/pvrusb2-hdw.c
index 13639b30270..33ea950abb4 100644
--- a/drivers/media/video/pvrusb2/pvrusb2-hdw.c
+++ b/drivers/media/video/pvrusb2/pvrusb2-hdw.c
@@ -2030,7 +2030,8 @@ static int pvr2_hdw_load_subdev(struct pvr2_hdw *hdw,
fname = (mid < ARRAY_SIZE(module_names)) ? module_names[mid] : NULL;
if (!fname) {
pvr2_trace(PVR2_TRACE_ERROR_LEGS,
- "Module ID %u for device %s has no name",
+ "Module ID %u for device %s has no name?"
+ " The driver might have a configuration problem.",
mid,
hdw->hdw_desc->description);
return -EINVAL;
@@ -2058,7 +2059,8 @@ static int pvr2_hdw_load_subdev(struct pvr2_hdw *hdw,
if (!i2ccnt) {
pvr2_trace(PVR2_TRACE_ERROR_LEGS,
"Module ID %u (%s) for device %s:"
- " No i2c addresses",
+ " No i2c addresses."
+ " The driver might have a configuration problem.",
mid, fname, hdw->hdw_desc->description);
return -EINVAL;
}
@@ -2090,7 +2092,9 @@ static int pvr2_hdw_load_subdev(struct pvr2_hdw *hdw,
if (!sd) {
pvr2_trace(PVR2_TRACE_ERROR_LEGS,
- "Module ID %u (%s) for device %s failed to load",
+ "Module ID %u (%s) for device %s failed to load."
+ " Possible missing sub-device kernel module or"
+ " initialization failure within module.",
mid, fname, hdw->hdw_desc->description);
return -EIO;
}
@@ -2132,7 +2136,10 @@ static void pvr2_hdw_load_modules(struct pvr2_hdw *hdw)
for (idx = 0; idx < ct->cnt; idx++) {
if (pvr2_hdw_load_subdev(hdw, &ct->lst[idx]) < 0) okFl = 0;
}
- if (!okFl) pvr2_hdw_render_useless(hdw);
+ if (!okFl) {
+ hdw->flag_modulefail = !0;
+ pvr2_hdw_render_useless(hdw);
+ }
}
@@ -2334,6 +2341,19 @@ static void pvr2_hdw_setup(struct pvr2_hdw *hdw)
break;
}
}
+ if (hdw->flag_modulefail) {
+ pvr2_trace(
+ PVR2_TRACE_ERROR_LEGS,
+ "***WARNING*** pvrusb2 driver initialization"
+ " failed due to the failure of one or more"
+ " sub-device kernel modules.");
+ pvr2_trace(
+ PVR2_TRACE_ERROR_LEGS,
+ "You need to resolve the failing condition"
+ " before this driver can function. There"
+ " should be some earlier messages giving more"
+ " information about the problem.");
+ }
if (procreload) {
pvr2_trace(
PVR2_TRACE_ERROR_LEGS,