staging: ced1401: fix GFP_KERNEL in spinlock context
Allowi() calls usb_submit_urb(pdx->pUrbCharIn, bInCallback ? GFP_ATOMIC : GFP_KERNEL)
under spin_lock_irqsave(&pdx->charInLock, flags). That means it should use GFP_ATOMIC anyway.
As soon as it is the only usage of bInCallback argument, the patch removes it at all.
Found by Linux Driver Verification project (linuxtesting.org).
Note that "midibuf" would be another good name but sound/oss/midibuf.c
already uses it for a different concept. Avoid possible confusion by
using "midi_buffer" instead.
Signed-off-by: Stefan Hajnoczi <stefanha@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Stefan Hajnoczi [Fri, 11 Jan 2013 22:08:11 +0000 (23:08 +0100)]
staging: line6: use pr_err() instead of printk(KERN_ERR, ...)
Fix the following checkpatch.pl warning:
WARNING: Prefer netdev_err(netdev, ... then dev_err(dev, ... then pr_err(... to printk(KERN_ERR ...
#1861: FILE: staging/line6/driver.h:56:
+ printk(KERN_ERR "line6usb driver bug: missing case in %s:%d\n", \
Signed-off-by: Stefan Hajnoczi <stefanha@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Stefan Hajnoczi [Fri, 11 Jan 2013 22:08:10 +0000 (23:08 +0100)]
staging: line6: wrap comment to 80 chars in driver.c
Fix the following checkpatch.pl warning:
WARNING: line over 80 characters
#1107: FILE: staging/line6/driver.c:523:
+ /* Wait for data length. We'll get a couple of 0xff until length arrives. */
Signed-off-by: Stefan Hajnoczi <stefanha@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Since the struct is only used to define the global
toneport_source_info[] table, I have chosen to make the struct
anonymous and part of the table definition.
Signed-off-by: Stefan Hajnoczi <stefanha@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Przemo Firszt [Mon, 10 Dec 2012 23:21:22 +0000 (23:21 +0000)]
rtl8712: replace min with min_t
I've changed the ugly casting here and used min_t() instead. I
also changed the u16 to a u32 because ->network.Ssid.SsidLength
is 32 bits. It doesn't make a difference, but truncating the
upper bits away is sloppy.
Przemo Firszt [Mon, 10 Dec 2012 23:21:19 +0000 (23:21 +0000)]
rtl8712: code clean up
Clean some trivial formating problems in rtl8712 from staging tree. This patch
also changes the way preprocessor macros are defined to keep checkpatch.pl
quiet.
staging: tidspbridge: use prepare/unprepare on dsp clocks
This solves runtime failures while trying to enable WDT3 related
functionality on firmware load, however it does affect other clocks
controlled by the driver. Seen on 3.8-rc1.
CCF provides clk_prepare and clk_unprepare for enable and disable
operations respectively, this needs to be called in the correct
order while handling clocks.
Code path to enable/disable dsp clocks can still be reached from an
atomic context, hence we can't use clk_prepare_enable and
clk_disable_unprepare yet.
Signed-off-by: Omar Ramirez Luna <omar.ramirez@copitl.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
staging: tidspbridge: Fix build breakage due to splitting CM functions.
Commit ff4ae5d (ARM: OMAP2+: CM/hwmod: split CM functions into OMAP2, OMAP3-specific files)
resulted in a build breakage for tidspbridge driver.
...
CC [M] drivers/staging/tidspbridge/core/tiomap3430.o
staging/tidspbridge/core/tiomap3430.c: In function ‘bridge_brd_start’:
staging/tidspbridge/core/tiomap3430.c:550:24: error: ‘OMAP3430_CM_AUTOIDLE_PLL’
undeclared (first use in this function)
make[3]: *** [drivers/staging/tidspbridge/core/tiomap3430.o] Error 1
...
Fix this by including the appropriate header file.
Signed-off-by: Enric Balletbo i Serra <eballetbo@iseebcn.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Peter Huewe [Mon, 7 Jan 2013 22:09:53 +0000 (23:09 +0100)]
staging/csr: Fix dereference before check
Smatch complains about some pointers that are dereferenced before being
checked:
drivers/staging/csr/sme_sys.c:285
CsrWifiRouterCtrlHipReqHandler() warn: variable dereferenced before
check 'priv' (see line 283)
drivers/staging/csr/sme_sys.c:1503
CsrWifiRouterMaPacketReqHandler() warn: variable dereferenced before
check 'priv' (see line 1501)
drivers/staging/csr/sme_sys.c:2062
CsrWifiRouterCtrlPeerDelReqHandler() warn: variable dereferenced before
check 'priv' (see line 2059)
drivers/staging/csr/sme_sys.c:2477
CsrWifiRouterCtrlPeerAddReqHandler() warn: variable dereferenced before
check 'priv' (see line 2474)
drivers/staging/csr/sme_sys.c:3045
CsrWifiRouterCtrlWapiRxPktReqHandler() warn: variable dereferenced
before check 'priv' (see line 3039)
We put the check before the dereferencing and prevent an oops and fix
the warning.
Signed-off-by: Peter Huewe <peterhuewe@gmx.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Instead of using the #ifdef'ery in the comedi_compat32.c and proc.c
files to include/exclude them from the comedi core, modify the Makefile
to include those files automatically when enabled in the .config.
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Cc: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Ian Abbott [Fri, 4 Jan 2013 11:33:21 +0000 (11:33 +0000)]
staging: comedi: comedi_test: fix race when cancelling command
Éric Piel reported a kernel oops in the "comedi_test" module. It was a
NULL pointer dereference within `waveform_ai_interrupt()` (actually a
timer function) that sometimes occurred when a running asynchronous
command is cancelled (either by the `COMEDI_CANCEL` ioctl or by closing
the device file).
This seems to be a race between the caller of `waveform_ai_cancel()`
which on return from that function goes and tears down the running
command, and the timer function which uses the command. In particular,
`async->cmd.chanlist` gets freed (and the pointer set to NULL) by
`do_become_nonbusy()` in "comedi_fops.c" but a previously scheduled
`waveform_ai_interrupt()` timer function will dereference that pointer
regardless, leading to the oops.
Fix it by replacing the `del_timer()` call in `waveform_ai_cancel()`
with `del_timer_sync()`.
Ian Abbott [Thu, 3 Jan 2013 12:15:26 +0000 (12:15 +0000)]
staging: comedi: Kconfig: COMEDI_NI_AT_A2150 should select COMEDI_FC
The 'ni_at_a2150' module links to `cfc_write_to_buffer` in the
'comedi_fc' module, so selecting 'COMEDI_NI_AT_A2150' in the kernel config
needs to also select 'COMEDI_FC'.
Ian Abbott [Fri, 4 Jan 2013 11:33:24 +0000 (11:33 +0000)]
staging: comedi: comedi_test: make samples unsigned
Represent the fake samples as unsigned shorts instead of signed shorts,
as this is the usual Comedi convention. There is no change to the
actual binary representation, although the `cfc_write_to_buffer()` call
currently expects a signed short for some bizarre reason.
Signed-off-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Ian Abbott [Fri, 4 Jan 2013 11:33:23 +0000 (11:33 +0000)]
staging: comedi: comedi_test: change end-of-acquisition test
In the "comedi_test" module's acquisition timer function
`waveform_ai_interrupt()`, move the code for ending the acquisition
outside the scan loop. Determine if the number of scans to be done is
sufficient to end the acquisition before entering the scan loop. On
leaving the scan loop, set the `COMEDI_CB_EOA` event if the acquisition
is ending. Only reschedule the timer if the acquisition is not ending.
Remove the somewhat useless `timer_running` flag from the private data.
This was intended to stop the timer function adding the timer back on
the timer queue periodically, but the flag setting wasn't synchronized
with the timer and we already use `del_timer_sync()` to synchronize
removal from the queue.
Signed-off-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
In the "comedi_test" module, the timer function
`waveform_ai_interrupt()` doesn't need to remove the timer from the
timer queue as the caller has already removed it from the queue. Remove
the call to `del_timer()` in this function.
Signed-off-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Ian Abbott [Fri, 4 Jan 2013 11:33:21 +0000 (11:33 +0000)]
staging: comedi: comedi_test: fix race when cancelling command
Éric Piel reported a kernel oops in the "comedi_test" module. It was a
NULL pointer dereference within `waveform_ai_interrupt()` (actually a
timer function) that sometimes occurred when a running asynchronous
command is cancelled (either by the `COMEDI_CANCEL` ioctl or by closing
the device file).
This seems to be a race between the caller of `waveform_ai_cancel()`
which on return from that function goes and tears down the running
command, and the timer function which uses the command. In particular,
`async->cmd.chanlist` gets freed (and the pointer set to NULL) by
`do_become_nonbusy()` in "comedi_fops.c" but a previously scheduled
`waveform_ai_interrupt()` timer function will dereference that pointer
regardless, leading to the oops.
Fix it by replacing the `del_timer()` call in `waveform_ai_cancel()`
with `del_timer_sync()`.
staging: comedi: store the 'index' for each subdevice
Store the 'index' for each comedi_subdevice when they are initially
allocated by comedi_alloc_subdevice(). This allows removing the
pointer math in comedi_fops.c which is used to figure out the
index that user space uses to access the individual subdevices.
Fix the ni_mio_common driver so it also uses the 'index' instead
of doing the pointer math.
Also, remove a couple unused macros in the pcmda12, pcmmio, and
pcmuio drivers which also do the pointer math to figure out the
index.
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Cc: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Use comedi_dev_from_minor() to simplify the return -ENODEV tests.
Change the (foo == NULL) tests to simply (!foo).
Use a local variable to hold a pointer to the async->buf_page_list[]
when doing the remap_pfn_range(). This cleans up the ugly line breaks
for the page_to_pfn(virt_to_page(...) operation.
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Cc: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The 'get' usually implies increasing a reference count of an object.
These function return a pointer but do not do any reference counting.
For aesthetic reasons, rename the functions to better represent what
they do.
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Cc: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The 'get' usually implies increasing a reference count of an object.
This function returns a pointer but does not do any reference counting.
For aesthetic reasons, rename the function to better represent what
its doing.
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Cc: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
For aesthetic reasons, rename this struct to comedi_file_info. It's
a bit shorter and allows fixing some of the ugly line breaks used
to keep the lines < 80 chars.
Also, consistently use the local variable name 'info' instead of the
longer 'dev_file_info' to also fix some ugly line breaks.
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Cc: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This structure is only used in comedi_fops.c as part of handling
the file operations and sysfs files. Remove it's defenition from
comedidev.h so it's not exposed to the comedi drivers.
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Cc: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Remove the need to export comedi_get_device_file_info() by using the
new helper comedi_dev_from_minor(). This will also allow us to make
the comedi_device_file_info struct private.
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Cc: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
A number of functions have to call comedi_get_device_file_info()
to get the comedi_device_file_info pointer for a given minor. That
pointer is only used to get the actual comedi_device pointer for
the minor.
Introduce a new helper function, comedi_dev_from_minor(), to simplify
this operation. This will also allow us to make the comedi_device_file_info
struct private.
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Cc: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Ian Abbott [Tue, 4 Dec 2012 15:59:55 +0000 (15:59 +0000)]
staging: comedi: prevent auto-unconfig of manually configured devices
When a low-level comedi driver auto-configures a device, a `struct
comedi_dev_file_info` is allocated (as well as a `struct
comedi_device`) by `comedi_alloc_board_minor()`. A pointer to the
hardware `struct device` is stored as a cookie in the `struct
comedi_dev_file_info`. When the low-level comedi driver
auto-unconfigures the device, `comedi_auto_unconfig()` uses the cookie
to find the `struct comedi_dev_file_info` so it can detach the comedi
device from the driver, clean it up and free it.
A problem arises if the user manually unconfigures and reconfigures the
comedi device using the `COMEDI_DEVCONFIG` ioctl so that is no longer
associated with the original hardware device. The problem is that the
cookie is not cleared, so that a call to `comedi_auto_unconfig()` from
the low-level driver will still find it, detach it, clean it up and free
it.
Stop this problem occurring by always clearing the `hardware_device`
cookie in the `struct comedi_dev_file_info` whenever the
`COMEDI_DEVCONFIG` ioctl call is successful.
Éric Piel [Wed, 19 Dec 2012 12:03:13 +0000 (13:03 +0100)]
staging: comedi: fix minimum AO period for NI 625x and NI 628x
The minimum period was set to 357 ns, while the divider for these boards is 50
ns. This prevented to output at maximum speed as ni_ao_cmdtest() would return
357 but would not accept it.
Not sure why it was set to 357 ns (this was done before the git history,
which starts 5 years ago). My guess is that it comes from reading the
specification stating a 2.8 MHz rate (~ 357 ns). The latest
specification states a 2.86 MHz rate (~ 350 ns), which makes a lot
more sense.
This module is built whenever CONFIG_COMEDI is enabled but it is
only used by the pcmmio and pcmuio drivers. The pcm_common module
consists of one exported function. Put a local copy of the function
in the pcmmio and pcmuio drivers.
This removes the need for the pcm_common module and the now unused
pcm_common.[ch] files can be deleted and removed from the Makefile.
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Cc: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Ian Abbott [Mon, 3 Dec 2012 18:15:47 +0000 (18:15 +0000)]
staging: comedi: addi_apci_2032: support stop_src == TRIG_COUNT
When setting up asynchronous commands on the special interrupt
subdevice, support the `TRIG_COUNT` stop source to allow the command to
stop automatically after a specified number of scans.
Signed-off-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Initialize the special interrupt subdevice as a digital input subdevice
even if the interrupt handler cannot be registered. It's `insn_bits`
handler will still read the interrupt status register. This hardware
status bits in this register might be valid even if they haven't been
enabled in the interrupt control register, but this needs to be checked.
In any case, initializing the subdevice as a digital input subdevice is
harmless.
Signed-off-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Ian Abbott [Mon, 3 Dec 2012 18:15:45 +0000 (18:15 +0000)]
staging: comedi: addi_apci_2032: use channel list
When setting up asynchronous commands for the special interrupt
subdevice, use the channel list to decide which interrupt sources to
enable. Set the maximum length of the channel list to be the same as
the number of channels (2). Normally, the channel list would include
channel 0, channel 1 or both.
When reading the scan data in the interrupt routine, the readings from
each channel in the channel list will be packed into a single unsigned
short data value. Make each bit in this value correspond to an index in
the channel list.
Since all the channels in the channel list are read at the same time,
insist that the scan end argument is the length of the channel list and
that the conversion source is `TRIG_NOW`.
Allocate some private data for the special interrupt subdevice to hold a
spin-lock, the channels to be enabled and an indication of whether the
command is still active. Stop the command if a buffer overflow occurs.
Signed-off-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Ian Abbott [Mon, 3 Dec 2012 18:15:44 +0000 (18:15 +0000)]
staging: comedi: addi_apci_2032: only disable triggered interrupts
The interrupt handler disables all interrupt sources when a valid
interrupt occurs. Just disable the triggered interrupt source so we can
still get interrupts for the other interrupt source.
Also add a comment indicating why the triggered interrupt source is
disabled. The interrupt sources are level-sensitive and indicate
hardware errors that are likely to be persistent, so if we reenabled
them they would just keep triggering repeatedly.
Signed-off-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Ian Abbott [Mon, 3 Dec 2012 18:15:43 +0000 (18:15 +0000)]
staging: comedi: addi_apci_2032: make insn_bits read live data
The `insn_bits` handler for the special digital input subdevice used for
interrupts currently uses `s->state` for the data value, which is set to
the value of the APCI2032_INT_STATUS_REG register when a valid interrupt
occurs. Just read the live register contents in the `insn_bits` handler
instead of relying on the interrupt service routine to read it for us.
The register contains a couple of hardware error status bits. They
might also be valid even when the corresponding bits have not been
enabled in the APCI_INT_CTRL_REG register in which case this would be
useful for checking for hardware errors without using interrupts, but
this needs to be checked.
Signed-off-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Ian Abbott [Mon, 3 Dec 2012 18:15:42 +0000 (18:15 +0000)]
staging: comedi: addi_apci_2032: set COMEDI_CB_OVERFLOW
If the call to `comedi_buf_put()` fails in the interrupt routine, set
the `COMEDI_CB_OVERFLOW` event flag. Note that the `COMEDI_CB_ERROR`
flag will have also been set by `comedi_buf_put()` in this case.
Signed-off-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The subdevice type and flags are initialized incorrectly for the
interrupt subdevice - the SDF_CMD_READ value belongs in the subdevice
flags. Fix it. Also set the number of channels to 2 since there are 2
interrupt sources each with its own status bit.
Signed-off-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Put the hardware into a safe state before enabling the interrupt. In
the interrupt routine, check the device has been fully configured by
checking `dev->attached`. In particular, `dev->read_subdev` could be
NULL early on and although the hardware's status register should
indicate no interrupt has occurred (since it's been put into a safe
state), it's better not to rely on it.
Signed-off-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cyril Roelandt [Tue, 4 Dec 2012 20:41:07 +0000 (21:41 +0100)]
staging: csr: remove unneeded call to memset().
In uf_send_pkt_to_encrypt(), the memory area zeroed by this call to memset() is
overwritten by a call to memcpy() a few instructions later, so it is not needed.
Laurent Navet [Fri, 30 Nov 2012 10:57:32 +0000 (11:57 +0100)]
staging: line6: pcm.c fix checkpatch issues
fix those checkpatch issues
drivers/staging/line6/pcm.c:84:
WARNING: simple_strtoul is obsolete, use kstrtoul instead
call to obsolete simple_strtoul() replaced by kstrtoint()
drivers/staging/line6/pcm.c:423:
ERROR: switch and case should be at the same indent
realigns comments
This patch forbids loading vme_pio2 module without specifing "num_bus" parameter.
Otherwise on module unloading pio2_exit() calls vme_unregister_driver() for not
registered pio2_driver.
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