Remove paragraph about writing to the Free Software Foundation's
mailing address from GPL notice.
This patch fixes the following checkpatch error:
CHECK:FSF_MAILING_ADDRESS at line 17.
Signed-off-by: Fabio Falzoi <fabio.falzoi84@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
We learned that it was possible for the core networking code to call
visornic_xmit() within ISR context, resulting in the need for us to
use spin_lock_irqsave() / spin_lock_irqrestore() to lock accesses to our
virtual device channels.
Without the correct locking added in this patch, random hangs would occur
on typical kernels while stressing the netork. When using a kernel with
CONFIG_DEBUG_SPINLOCK=y, a stackdump would occur at the time of the hang
reporting:
BUG: spinlock recursion on CPU#0, vnic_incoming/<pid>
(see below for more details)
We considered the possibility of adding a protocol between a visordriver
and visorbus where the visordriver could specify which type of locking it
required for its virtual device channels (essentially indicating whether
or not it was possible for the channel to be accessed in ISR context), but
decided this extra complexity was NOT needed, and that channel queues
should always be accessed with the most-stringent locking. So that is
what is implemented in this commit.
Below is an example stackdump illustrating the spinlock recursion that is
fixed by this commit. Note that we are first in virtnic_rx() writing to
the device channel when an APIC timer interrupt occurs. Within the core
networking code, net_rx_action() calls process_backlog(), which eventually
lands up back up in virtnic_xmit() in the code attempting to also write to
the device channel.
BUG: spinlock recursion on CPU#0, vnic_incoming/262
lock: 0xffff88002db810c0, .magic: dead4ead, .owner: vnic_incoming/262,
.owner_cpu: 0
CPU: 0 PID: 262 Comm: vnic_incoming
Tainted: G C 4.2.0-rc1-ARCH+ #56
Hardware name: Dell Inc. PowerEdge T110/ , BIOS 1.23 12/15/2009
ffff8800216ac200 ffff88002c803388 ffffffff81476364 0000000000000106
ffff88002db810c0 ffff88002c8033a8 ffffffff8109e2bc ffff88002db810c0
ffffffff817631d4 ffff88002c8033c8 ffffffff8109e330 ffff88002db810c0
Call Trace:
<IRQ> [<ffffffff81476364>] dump_stack+0x4f/0x73
[<ffffffff8109e2bc>] spin_dump+0x7c/0xc0
[<ffffffff8109e330>] spin_bug+0x30/0x40
[<ffffffff8109e547>] do_raw_spin_lock+0x127/0x140
[<ffffffff8147bad0>] _raw_spin_lock+0x40/0x50
[<ffffffffa0151fa6>] ? visorchannel_signalinsert+0x46/0x70 [visorbus]
[<ffffffffa0151fa6>] visorchannel_signalinsert+0x46/0x70 [visorbus]
[<ffffffffa01683a2>] visornic_xmit+0x302/0x5d0 [visornic]
[<ffffffff813b2f30>] dev_hard_start_xmit+0x2e0/0x510
[<ffffffff813b2b75>] ? validate_xmit_skb+0x235/0x310
[<ffffffff813d79e7>] sch_direct_xmit+0xf7/0x1d0
[<ffffffff813b34d3>] __dev_queue_xmit+0x203/0x640
[<ffffffff813b3320>] ? __dev_queue_xmit+0x50/0x640
[<ffffffff813f3f6f>] ? ip_finish_output+0x1df/0x310
[<ffffffff813b3933>] dev_queue_xmit_sk+0x13/0x20
[<ffffffff813f3a5c>] ip_finish_output2+0x22c/0x470
[<ffffffff813f3f6f>] ? ip_finish_output+0x1df/0x310
[<ffffffff810987e0>] ? __lock_is_held+0x50/0x70
[<ffffffff813f3f6f>] ip_finish_output+0x1df/0x310
[<ffffffff813f4c31>] ip_output+0xb1/0x100
[<ffffffff813f41be>] ip_local_out_sk+0x3e/0x80
[<ffffffff813f4388>] ip_queue_xmit+0x188/0x4a0
[<ffffffff813f4200>] ? ip_local_out_sk+0x80/0x80
[<ffffffff8139fcd6>] ? __alloc_skb+0x86/0x1e0
[<ffffffff8140bd5b>] tcp_transmit_skb+0x4cb/0x9c0
[<ffffffff8139f0dc>] ? __kmalloc_reserve+0x3c/0x90
[<ffffffff8139fcea>] ? __alloc_skb+0x9a/0x1e0
[<ffffffff8140c47d>] tcp_send_ack+0x10d/0x150
[<ffffffff814060ee>] __tcp_ack_snd_check+0x5e/0x90
[<ffffffff81408eb4>] tcp_rcv_established+0x354/0x710
[<ffffffff81412182>] tcp_v4_do_rcv+0x162/0x3f0
[<ffffffff81414412>] tcp_v4_rcv+0xb22/0xb50
[<ffffffff813ee2bc>] ? ip_local_deliver_finish+0x4c/0x2d0
[<ffffffff813ee350>] ip_local_deliver_finish+0xe0/0x2d0
[<ffffffff813ee2bc>] ? ip_local_deliver_finish+0x4c/0x2d0
[<ffffffff813ee72e>] ip_local_deliver+0xae/0xc0
[<ffffffff813edeaf>] ip_rcv_finish+0x14f/0x510
[<ffffffff813aab2d>] ? __netif_receive_skb_core+0x9d/0xb70
[<ffffffff813eea13>] ip_rcv+0x2d3/0x3b0
[<ffffffff81097110>] ? cpuacct_css_alloc+0xb0/0xb0
[<ffffffff813ab0f3>] __netif_receive_skb_core+0x663/0xb70
[<ffffffff813aab2d>] ? __netif_receive_skb_core+0x9d/0xb70
[<ffffffff810971a9>] ? cpuacct_charge+0x99/0xb0
[<ffffffff81097110>] ? cpuacct_css_alloc+0xb0/0xb0
[<ffffffff810987e0>] ? __lock_is_held+0x50/0x70
[<ffffffff813ab72c>] ? process_backlog+0xbc/0x150
[<ffffffff813ab78b>] ? process_backlog+0x11b/0x150
[<ffffffff813ab627>] __netif_receive_skb+0x27/0x70
[<ffffffff813ab702>] process_backlog+0x92/0x150
[<ffffffff813afffd>] net_rx_action+0x13d/0x350
[<ffffffff81036b2d>] ? lapic_next_event+0x1d/0x30
[<ffffffff81058694>] __do_softirq+0x104/0x320
[<ffffffff810c0788>] ? hrtimer_interrupt+0xc8/0x1a0
[<ffffffff81074e70>] ? blocking_notifier_chain_cond_register+0x70/0x70
[<ffffffff81058ab9>] irq_exit+0x79/0xa0
[<ffffffff8147ecca>] smp_apic_timer_interrupt+0x4a/0x60
[<ffffffff8147d2c8>] apic_timer_interrupt+0x68/0x70
<EOI> [<ffffffff81271c02>] ? __memcpy+0x12/0x20
[<ffffffffa01517da>] ? visorchannel_write+0x4a/0x80 [visorbus]
[<ffffffffa0151eb8>] signalinsert_inner+0x88/0x130 [visorbus]
[<ffffffffa0151fb5>] visorchannel_signalinsert+0x55/0x70 [visorbus]
[<ffffffffa0166e57>] visornic_rx+0x12e7/0x19d0 [visornic]
[<ffffffffa01677c9>] process_incoming_rsps+0x289/0x690 [visornic]
[<ffffffff814771c5>] ? preempt_schedule+0x25/0x30
[<ffffffff81001026>] ? ___preempt_schedule+0x12/0x14
[<ffffffff81093080>] ? wait_woken+0x90/0x90
[<ffffffffa0167540>] ? visornic_rx+0x19d0/0x19d0 [visornic]
[<ffffffffa0167540>] ? visornic_rx+0x19d0/0x19d0 [visornic]
[<ffffffff81073a39>] kthread+0xe9/0x110
[<ffffffff81073950>] ? __init_kthread_worker+0x70/0x70
[<ffffffff8147c89f>] ret_from_fork+0x3f/0x70
[<ffffffff81073950>] ? __init_kthread_worker+0x70/0x70
Fixes: b12fdf7da ('staging: unisys: rework signal remove/insert to avoid sparse lock warnings')
Signed-off-by: Tim Sell <Timothy.Sell@unisys.com>
Signed-off-by: Benjamin Romer <benjamin.romer@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
A visorchannel associated with a device should have its writing to
the channel protected by a lock.
Fixes: b32c4997c ('staging: unisys: Move channel creation up the stack')
Signed-off-by: Tim Sell <Timothy.Sell@unisys.com>
Signed-off-by: Benjamin Romer <benjamin.romer@unisys.com>
Signed-off-by: David Kershner <david.kershner@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Remove some extra tabs in order to improve readalibility.
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This patch turns a kmalloc/memset into an equivalent kzalloc.
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
visorchannel_write() and it's user visorbus_write_channel() are
exported, so all visorbus function drivers (i.e., drivers that call
visorbus_register_visor_driver()) are potentially affected by the bug.
Because of pointer-arithmetic rules, the address being written to in the
affected code was actually at byte offset:
sizeof(struct channel_header) * offset
instead of just <offset> bytes as intended.
The bug could cause some very difficult-to-diagnose symptoms. The
particular problem that led me on this chase was a kernel fault that
would occur during 'insmod visornic' after a previous 'rmmod visornic',
where we would fault during netdev_register_kobject() within
pm_runtime_set_memalloc_noio() while traversing a device list, which
occurred because dev->parent for the visorbus device had become
corrupted.
Fixes: 0abb60c1c ('staging: unisys: visorchannel_write(): Handle...')
Signed-off-by: Tim Sell <Timothy.Sell@unisys.com>
Acked-by: Don Zickus <dzickus@redhat.com>
Signed-off-by: Benjamin Romer <benjamin.romer@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
I'm not sure what adverse runtime effects the previously-omitted
NULL-termination would cause, but the code was definitely wrong.
Fixes: 795731627c ('staging: unisys: Clean up device sysfs attributes')
Signed-off-by: Tim Sell <Timothy.Sell@unisys.com>
Acked-by: Don Zickus <dzickus@redhat.com>
Signed-off-by: Benjamin Romer <benjamin.romer@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
When building with ARCH=um you get the following error:
arch/x86/include/asm/cpufeature.h:252:42: error: 'REQUIRED_MASK0'
undeclared
The Unisys drivers should not be compiled for UML, so this patch addresses
that by adding a dependency to kconfig for !UML.
Reported-by: kbuild test robot <fengguang.wu@intel.com>
Tested-by: Ken Cox <jkc@redhat.com>
Signed-off-by: Ken Cox <jkc@redhat.com>
Signed-off-by: Benjamin Romer <benjamin.romer@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
We inadvertently remove the MODULE_DEVICE_TABLE line for visorbus,
this patch adds it back in.
Signed-off-by: David Kershner <david.kershner@unisys.com>
Signed-off-by: Benjamin Romer <benjamin.romer@unisys.com>
Fixes: d5b3f1dcce ('staging: unisys: move timskmod.h functionality')
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
A struct visornic_devdata for each visornic device is actually allocated as
part of alloc_etherdev(), here in visornic_probe():
netdev = alloc_etherdev(sizeof(struct visornic_devdata));
But code in devdata_release() was treating devdata as a pointer that needed
to be kfree()d! This was causing all sorts of weird behavior after doing
an rmmod of visornic, both because free_netdev() was actually freeing the
memory used for devdata, and because devdata wasn't pointing to
dynamically-allocated memory in the first place.
The kfree(devdata) and the kref that tracked devdata's usage have been
appropriately deleted.
Signed-off-by: Tim Sell <Timothy.Sell@unisys.com>
Signed-off-by: Benjamin Romer <benjamin.romer@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Just switch this line so it uses the correct function call.
Signed-off-by: Tim Sell <Timothy.Sell@unisys.com>
Signed-off-by: Benjamin Romer <benjamin.romer@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This only makes sense, since the worker thread depends upon the netdev
existing.
Signed-off-by: Tim Sell <Timothy.Sell@unisys.com>
Signed-off-by: Benjamin Romer <benjamin.romer@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
visornic_cleanup() was previously incorrectly destroying its global
workqueues prior to cleaning up the devices which used them. This patch
corrects the order of these operations.
Signed-off-by: Tim Sell <Timothy.Sell@unisys.com>
Signed-off-by: Benjamin Romer <benjamin.romer@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
visornic_remove() is called to logically detach the visornic driver from a
visorbus-supplied device, which can happen either just prior to a
visorbus-supplied device disappearing, or as a result of an rmmod of
visornic. Prior to this patch, logic was missing to properly clean up for
this removal, which was fixed via the following changes:
* A going_away flag is now used to interlock between device destruction and
workqueue operations, protected by priv_lock. I.e., setting
going_away=true under lock guarantees that no new work items can get
queued to the work queues. going_away=true also short-circuits other
operations to enable device destruction to proceed.
* Missing clean-up operations for the workqueues, netdev, debugfs entries,
and the worker thread were added.
* Memory referenced from the visornic private devdata struct is now freed
as part of devdata destruction.
Signed-off-by: Tim Sell <Timothy.Sell@unisys.com>
Signed-off-by: Benjamin Romer <benjamin.romer@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Looks like an errant patch fitting caused us to redundantly allocate the
workqueues at both the beginning and end of visornic_init(). This was
corrected by removing the allocations at the beginning.
Signed-off-by: Tim Sell <Timothy.Sell@unisys.com>
Signed-off-by: Benjamin Romer <benjamin.romer@unisys.com>
Fixes: 68905a14e4 ('staging: unisys: Add s-Par visornic ethernet driver')
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Add error message to genuine rare error paths, and debug messages
to enable relatively non-verbose tracing of code paths
You can enable debug messages by including this on the kernel command line:
visornic.dyndbg=+p
or by this from the command line:
echo "module visornic +p" > <debugfs>/dynamic_debug/control
Refer to Documentation/dynamic-debug-howto.txt for more details.
In addition to the new debug and error messages, a message like the
following will be logged every time a visornic device is probed, which
will enable you to map back-and-forth between visorbus device names
(e.g., "vbus2:dev0") and netdev names (e.g., "eth0"):
visornic vbus2:dev0: visornic_probe success netdev=eth0
With this patch and visornic debugging enabled, you should expect to see
messages like the following in the most-common scenarios:
* driver loaded:
visornic_init
* device probed:
visornic vbus2:dev0: visornic_probe
visor_thread_start
visor_thread_start success
* network interface configured (ifconfig):
net eth0: visornic_open
net eth0: visornic_enable_with_timeout
net eth0: visornic_enable_with_timeout success
net eth0: visornic_open success
Signed-off-by: Tim Sell <Timothy.Sell@unisys.com>
Signed-off-by: Benjamin Romer <benjamin.romer@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Neglect to NULL rcvbuf pointer array could result in faults later
This problem would exhibit itself as a fault when when attempting to stop
any visornic device (i.e., in visornic_disable_with_timeout() or
visornic_serverdown_complete()) that had never been started (i.e., for
which init_rcv_bufs() had never been called). Because the array of rcvbuf
was never cleared to NULLs, we would mistakenly attempt to call kfree_skb()
on garbage memory.
Signed-off-by: Tim Sell <Timothy.Sell@unisys.com>
Signed-off-by: Benjamin Romer <benjamin.romer@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Prevent faults in visornic_pause, visornic_resume(), and visornic_remove()
Prior to this patch, any call to visornic_pause(), visornic_resume(), or
visornic_remove() would fault, due to dev_set_drvdata() never having been
called to stash our struct visornic_devdata * into the device's drvdata.
I.e., all calls to dev_get_drvdata() were returning NULL, meaning a fault
was soon to follow.
Signed-off-by: Tim Sell <Timothy.Sell@unisys.com>
Signed-off-by: Benjamin Romer <benjamin.romer@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Correct visornic_pause() to indicate completion asynchronously rather
than in-line
Previously, visornic_pause() (called to stop the device due to IOVM service
partition recovery) was calling the passed complete_func() in-line, rather
than delaying the calling until after the device had actually been stopped.
The behavior has been corrected so that the calling of the complete_func()
is now delayed until after the stopping of the device has been completed in
visornic_serverdown_complete(), which runs asynchronously via the workqueue
visornic_serverdown_workqueue.
Signed-off-by: Tim Sell <Timothy.Sell@unisys.com>
Signed-off-by: Benjamin Romer <benjamin.romer@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Prevent faults processing messages for devices that no driver has yet
registered to handle.
Previously, code of the form:
drv = to_visor_driver(dev->device.driver);
if (!drv)
goto away;
was not having the desired intent, because to_visor_driver() was
essentially returning garbage if its argument was NULL. The only existing
case of this is in initiate_chipset_device_pause_resume(), which is called
during IOVM service partition recovery. We were thus faulting when IOVM
service partition recovery was initiated on a bus that had at least one
device for which no function driver had registered
(visorbus_register_visor_driver).
Signed-off-by: Tim Sell <Timothy.Sell@unisys.com>
Signed-off-by: Benjamin Romer <benjamin.romer@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Fix problem that prevents us from responding to any device message after
device_create.
By neglecting to NULL out pending_msg_hdr after the device_create response,
we were effectively preventing any subsequent messages to the device from
working, because device_epilog() will correctly bail out early if it sees
that pending_msg_hdr is still set non-NULL, as that is an indicator to mean
that an unanswered message is still outstanding.
This problem was discovered as part of testing IOVM service partition
recovery, because device_epilog() was in fact bailing out when it was
called from my_device_changestate(), which of course prevented us from
transitioning the device to the paused state. However, the incorrect
behavior would occur for ANY subsequent command directed at the device,
not just for changestate.
Signed-off-by: Tim Sell <Timothy.Sell@unisys.com>
Signed-off-by: Benjamin Romer <benjamin.romer@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This is a patch to the ddk750_dvi.h file that fixes up a brace error
found by the checkpatch.pl tool
Signed-off-by: Anders Fridlund <anders.fridlund@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
kernel coding style fixes for below messages from
scripts/checkpatch.pl
ERROR: do not initialise globals to 0 or NULL
Signed-off-by: Vinay Simha BN <simhavcs@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Add spaces according to checkpatch.pl messages:
"ERROR: spaces required around that '=' (ctx:VxV)"
"ERROR: need consistent spacing around '-' (ctx:WxV)"
"ERROR: spaces required around that '?' (ctx:VxE)"
"ERROR: need consistent spacing around '&' (ctx:VxW)"
Signed-off-by: Anatoly Stepanov <drivengroove@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Fix according to checkpatch.pl message:
"ERROR: open brace '{' following function declarations go on the next line"
Signed-off-by: Anatoly Stepanov <drivengroove@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Remove assignment from if condition according to checkpatch.pl message:
"ERROR: do not use assignment in if condition"
Signed-off-by: Anatoly Stepanov <drivengroove@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Fix according to checkpatch.pl message:
"ERROR: switch and case should be at the same indent"
Signed-off-by: Anatoly Stepanov <drivengroove@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Fix indentation according to checkpatch.pl message:
"ERROR: space required after that close brace '}'"
Signed-off-by: Anatoly Stepanov <drivengroove@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Fix open braces according to checkpatch.pl message:
"ERROR: that open brace { should be on the previous line"
Signed-off-by: Anatoly Stepanov <drivengroove@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Insert spaces before '(' according to checkpatch.pl message:
"ERROR: space required before the open parenthesis"
Signed-off-by: Anatoly Stepanov <drivengroove@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Insert spaces according to checkpatch.pl message:
"ERROR: space required before the open brace '{'"
Signed-off-by: Anatoly Stepanov <drivengroove@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Replace spaces with tabs according to checkpatch.pl error message:
"ERROR: code indent should use tabs where possible"
Signed-off-by: Anatoly Stepanov <drivengroove@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This patch removes the redundant __func__ from dynamic debug prints as
the pr_xxx set of functions can be dynamically controlled to include
function name.Also fix a typo in debug statement.
Signed-off-by: Hari Prasath Gujulan Elango <hgujulan@visteon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This patch fixes the checkpatch.pl warning:
WARNING: ENOSYS means 'invalid syscall nr' and nothing else
try_module_get fails when the reference count of the module is not
allowed to be incremented ,and hence -ENXIO is returned indicating
no device or address.
[IA - combined two of santhosh's changes to the error return value!]
Signed-off-by: santhosh pai <santhosh.pai88@yahoo.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
If the "comedi" module has been loaded with the
"comedi_num_legacy_minors" module parameter set to a non-zero value,
some reserved comedi devices get created. These can be attached to a
low-level comedi driver using the `COMEDI_DEVCONFIG` ioctl command,
which checks for the `CAP_SYS_ADMIN` capability. Of course, the comedi
device needs to be opened before the ioctl command can be sent. If the
comedi device is unattached, `comedi_open()` currently requires the
`CAP_NET_ADMIN` capability. It makes more sense to just require the
`CAP_SYS_ADMIN` capability here, so change it.
For the curious, commit a8f80e8ff9 ("Networking: use CAP_NET_ADMIN
when deciding to call request_module") changed this capability from
`CAP_SYS_MODULE` to `CAP_NET_ADMIN`, even though it doesn't seem
relevant here. The original `CAP_SYS_MODULE` capability was due to the
function having some code to request a module using a "char-major-%i-%i"
alias, but that was never compiled in and was removed by commit
f30f2c2d41 ("staging: comedi: remove check for CONFIG_KMOD").
Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The analog output range is not programmable, but the ranges for each of
the two analog output channels are settable via jumpers. These jumper
settings are not readable by the driver. The driver
provides a range table containing all the possible internal ranges
(+/-10V, +/-5V, 0-10V, 0-5V) to provide information to the user
application (although any range selected by the application that differs
from the jumper settings will not produce the expected voltage output).
The range table does not cover all possible ranges of the analog output
channels. The jumpers also allow an external reference voltage between
0 and 10V to be used as bipolar or unipolar output range. Add a couple
more ranges to the end of the range table to define these two external
ranges.
Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This patch fixes the following sparse warning:
drivers/staging/comedi/comedi_compat32.c:205:16: warning: cast removes
address space of expression
Signed-off-by: Geliang Tang <geliangtang@163.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Warnings found by checkpatch.pl
WARNING: line over 80 characters
/drivers/staging/comedi/drivers/das16m1.c:414
+ if (devpriv->adc_count == 0 && hw_counter == devpriv->initial_hw_count) {
/drivers/staging/comedi/drivers/das16m1.c:417
/drivers/staging/comedi/drivers/das16m1.c:418
/drivers/staging/comedi/drivers/das16m1.c:419
/drivers/staging/comedi/drivers/das16m1.c:420
/drivers/staging/comedi/drivers/das16m1.c:421
Signed-off-by: Luis de Bethencourt <luis@debethencourt.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Warning found by checkpatch.pl
WARNING: please, no space before tabs
/drivers/staging/comedi/drivers/das16m1.c:83
+ 404-407 ^I8254$
Signed-off-by: Luis de Bethencourt <luis@debethencourt.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This patch simplify a trivial if-return sequence. Possibly combine with
a preceding function call.
Signed-off-by: Abdul Hussain <habdul@visteon.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This patch simplify a trivial if-return sequence. Possibly combine with
a preceding function call.
Signed-off-by: Abdul Hussain <habdul@visteon.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This patch simplify a trivial if-return sequence. Possibly combine with
a preceding function call.
Signed-off-by: Abdul Hussain <habdul@visteon.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This patch simplify a trivial if-return sequence. Possibly combine with
a preceding function call.
Signed-off-by: Abdul Hussain <habdul@visteon.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This patch simplify a trivial if-return sequence. Possibly combine with
a preceding function call.
Signed-off-by: Abdul Hussain <habdul@visteon.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
fixes checkpatch.pl WARNING: quoted string split across lines
+MODULE_AUTHOR("David A. Schleef <ds@schleef.org>, "
+ "Frank Mori Hess <fmhess@users.sourceforge.net>");
Modules with multiple authors have a MODULE_AUTHOR line for each one.
Signed-off-by: Luis de Bethencourt <luis@debethencourt.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
