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| author | James Hogan <james.hogan@imgtec.com> | 2014-12-08 19:17:07 +0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@osg.samsung.com> | 2014-12-23 21:21:45 +0300 |
| commit | 983c5bd26b86ba1c0d79b770e596bb8b77e42f32 (patch) | |
| tree | eafac29e07884f42b80f12f7ab0fb07062fbb5de /drivers | |
| parent | 40b8a5a65aa3ba51a80f7bd667df8403d54d6e7a (diff) | |
| download | linux-983c5bd26b86ba1c0d79b770e596bb8b77e42f32.tar.xz | |
[media] rc-main: Re-apply filter for no-op protocol change
Since commit da6e162d6a46 ("[media] rc-core: simplify sysfs code"), when
the IR protocol is set using the sysfs interface to the same set of
protocols that are already set, store_protocols() does not refresh the
scancode filter with the new protocol, even if it has already called the
change_protocol() callback successfully. This results in the filter
being disabled in the hardware and not re-enabled until the filter is
set again using sysfs.
Fix in store_protocols() by still re-applying the filter whenever the
change_protocol() driver callback succeeded.
The problem can be reproduced with the img-ir driver by setting a
filter, and then setting the protocol to the same protocol that is
already set:
$ echo nec > protocols
$ echo 0xffff > filter_mask
$ echo nec > protocols
After this, messages which don't match the filter were still being
received.
Fixes: da6e162d6a46 ("[media] rc-core: simplify sysfs code")
Reported-by: Sifan Naeem <sifan.naeem@imgtec.com>
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: David Härdeman <david@hardeman.nu>
Cc: <stable@vger.kernel.org> # v3.17+
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/media/rc/rc-main.c | 14 |
1 files changed, 7 insertions, 7 deletions
diff --git a/drivers/media/rc/rc-main.c b/drivers/media/rc/rc-main.c index 86ffcd54339e..f8c5e47a30aa 100644 --- a/drivers/media/rc/rc-main.c +++ b/drivers/media/rc/rc-main.c @@ -1021,16 +1021,16 @@ static ssize_t store_protocols(struct device *device, goto out; } - if (new_protocols == old_protocols) { - rc = len; - goto out; + if (new_protocols != old_protocols) { + *current_protocols = new_protocols; + IR_dprintk(1, "Protocols changed to 0x%llx\n", + (long long)new_protocols); } - *current_protocols = new_protocols; - IR_dprintk(1, "Protocols changed to 0x%llx\n", (long long)new_protocols); - /* - * If the protocol is changed the filter needs updating. + * If a protocol change was attempted the filter may need updating, even + * if the actual protocol mask hasn't changed (since the driver may have + * cleared the filter). * Try setting the same filter with the new protocol (if any). * Fall back to clearing the filter. */ |