Enable DAHDI to detect if an operation on a file handle refers to a
channel that may have been unregistered. This can occur, for example,
when a board driver is hot-swapped out in a live system.
This patch ensures that file->private_data is always properly set for
any open channel, and it's set back to NULL when a channel is
unregistered. This way file->private_data can be used to check whether
it's valid to perform an operation on the channel. (NOTE: There is
still a race condition here if the driver was unbound on one processor
during the window of time between when file->private_data was checked
and the system call finishes).
Also, since DAHDI should only return -ENODEV on read or write when there
was a surprise device removal on a running system this sleep can prevent
the system from becoming unresponsive if the userspace application does
not check for the -ENODEV error and constantly tries to call read with
elevated privileges.
(issue #17669)
Reported by: tzafrir
Tested by: sruffell
Review: https://reviewboard.asterisk.org/r/905/
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
git-svn-id: http://svn.asterisk.org/svn/dahdi/linux/trunk@9353 a0bf4364-ded3-4de4-8d8a-66a801d63aff
Most likely some stale debugging code that slipped in and is now gone.
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
git-svn-id: http://svn.asterisk.org/svn/dahdi/linux/trunk@9350 a0bf4364-ded3-4de4-8d8a-66a801d63aff
These members are no longer used in the driver and are now gone.
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
git-svn-id: http://svn.asterisk.org/svn/dahdi/linux/trunk@9348 a0bf4364-ded3-4de4-8d8a-66a801d63aff
It is possible to softlock if the board stops delivering interrupts in
the middle of a reset.
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
git-svn-id: http://svn.asterisk.org/svn/dahdi/linux/trunk@9332 a0bf4364-ded3-4de4-8d8a-66a801d63aff
I have yet to personally come across a system where this actually
changes the observable behavior, but it certainly seems like the sane
thing to do and I would rather not let this float around as a patch when
I can just merge it in.
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
git-svn-id: http://svn.asterisk.org/svn/dahdi/linux/trunk@9326 a0bf4364-ded3-4de4-8d8a-66a801d63aff
These three bits are already set by 'pci_enable_device' and
'pci_set_master' calls.
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
git-svn-id: http://svn.asterisk.org/svn/dahdi/linux/trunk@9325 a0bf4364-ded3-4de4-8d8a-66a801d63aff
Makes it a little more clear what the '0' parameter represents.
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
git-svn-id: http://svn.asterisk.org/svn/dahdi/linux/trunk@9324 a0bf4364-ded3-4de4-8d8a-66a801d63aff
These functions were only defined if BUF_MUNGE was defined, but even if
that symbol is defined there is not anyplace in the driver where these
functions were then called. This has been in the code since rev 87 so
this is most likely stale debugging code.
Feel free to revert if this is actually used somewhere that is not
apparent.
Here is where the functions were originally added to the drivers:
http://svnview.digium.com/svn/zaptel?view=revision&revision=87
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
git-svn-id: http://svn.asterisk.org/svn/dahdi/linux/trunk@9322 a0bf4364-ded3-4de4-8d8a-66a801d63aff
These label parameters were not used in the functions. They are most
likely some debug code that was left over.
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
git-svn-id: http://svn.asterisk.org/svn/dahdi/linux/trunk@9321 a0bf4364-ded3-4de4-8d8a-66a801d63aff
'open' and 'close' were already empty. 't1xxp_shutdown' only cleared
DAHDI_FLAGBIT_RUNNING which is already done in dahdi-base.c after calling
shutdown.
git-svn-id: http://svn.asterisk.org/svn/dahdi/linux/trunk@9318 a0bf4364-ded3-4de4-8d8a-66a801d63aff
Upon shutdown, both drivers would attempt to power down external
interfaces, but never attempted to bring them back up when the span was
restarted. Removing that code allows the driver to work properly until
a better solution can be found.
git-svn-id: http://svn.asterisk.org/svn/dahdi/linux/trunk@9316 a0bf4364-ded3-4de4-8d8a-66a801d63aff
dahdi_tool was incorrectly reporting all spans to be in local timing
mode. This is because the driver tracks which span it's timing syncs to,
within the card local struct "wc". We have to manually go through and
copy timing updates to the span local structs because this is what
dahdi_tool actually reads.
dahdi-526
git-svn-id: http://svn.asterisk.org/svn/dahdi/linux/trunk@9312 a0bf4364-ded3-4de4-8d8a-66a801d63aff
Put the "Master changed to xxx/x/x" message behind a debug flag. It's an
implementation specific detail and has caused confusion with customers.
DAHDI-692
git-svn-id: http://svn.asterisk.org/svn/dahdi/linux/trunk@9299 a0bf4364-ded3-4de4-8d8a-66a801d63aff
Kernel interface for network devices changed. This is the patch from issue
plus a few trivial checkpatch.pl formatting changes (minus the >80 column
warnings).
(closes issue #17857)
Reported by: msink
Patches:
dahdi_net-v2.patch uploaded by msink (license 1103)
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
git-svn-id: http://svn.asterisk.org/svn/dahdi/linux/trunk@9247 a0bf4364-ded3-4de4-8d8a-66a801d63aff
There are not any existing users of the interface (and it would always
return -ENOSYS to the caller anyway).
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
git-svn-id: http://svn.asterisk.org/svn/dahdi/linux/trunk@9246 a0bf4364-ded3-4de4-8d8a-66a801d63aff
Primarily to add a space between 'use' and 'the' in the alawoverride
description.
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
git-svn-id: http://svn.asterisk.org/svn/dahdi/linux/trunk@9245 a0bf4364-ded3-4de4-8d8a-66a801d63aff
This needs some more testing before it's on by default. If the card is
otherwise functioning, these messages may be confusing to the user. If
the card is not functioning, the driver can be reloaded with debug to
check for this condition.
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
git-svn-id: http://svn.asterisk.org/svn/dahdi/linux/trunk@9205 a0bf4364-ded3-4de4-8d8a-66a801d63aff
