- 04 Feb, 2013 40 commits
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Peter Huewe authored
Since the smaller LCDRefreshIndex is contained identically in LCDARefreshIndex we can simply use LCDARefreshIndex and skip the if/else. Since LCDARefreshIndex is only used readonly and contains only small unsigned values we also change its declaration to const u8. In order to prevent an out-of-bounds access I changed the mask from 0x0F to 0x07 and added a dummy value. Signed-off-by:
Peter Huewe <peterhuewe@gmx.de> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Minchan Kim authored
1) User of zram normally do mkfs.xxx or mkswap before using the zram block device(ex, normally, do it at booting time) It ends up allocating such metadata of zram before real usage so benefit of lazy initialzation would be mitigated. 2) Some user want to use zram when memory pressure is high.(ie, load zram dynamically, NOT booting time). It does make sense because people don't want to waste memory until memory pressure is high(ie, where zram is really helpful time). In this case, lazy initialzation could be failed easily because we will use GFP_NOIO instead of GFP_KERNEL for avoiding deadlock. So the benefit of lazy initialzation would be mitigated, too. 3) Metadata overhead is not critical and Nitin has a plan to diet it. 4K : 12 byte(64bit machine) -> 64G : 192M so 0.3% isn't big overhead If insane user use such big zram device up to 20, it could consume 6% of ram but efficieny of zram will cover the waste. So this patch gives up lazy initialization and instead we initialize metadata at disksize setting time. Acked-by:
Jerome Marchand <jmarchand@redhat.com> Acked-by:
Nitin Gupta <ngupta@vflare.org> Signed-off-by:
Minchan Kim <minchan@kernel.org> Signed-off-by:
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Minchan Kim authored
Now zram document syas "set disksize is optional" but partly it's wrong. When you try to use zram firstly after booting, you must set disksize, otherwise zram can't work because zram gendisk's size is 0. But once you do it, you can use zram freely after reset because reset doesn't reset to zero paradoxically. So in this time, disksize setting is optional.:( It's inconsitent for user behavior and not straightforward. This patch forces always setting disksize firstly before using zram. Yes. It changes current behavior so someone could complain when he upgrades zram. Apparently it could be a problem if zram is mainline but it still lives in staging so behavior could be changed for right way to go. Let them excuse. Acked-by:
Dan Magenheimer <dan.magenheimer@oracle.com> Signed-off-by:
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Minchan Kim authored
Now zram allocates new page with GFP_KERNEL in zram I/O path if IO is partial. Unfortunately, It may cause deadlock with reclaim path like below. write_page from fs fs_lock allocation(GFP_KERNEL) reclaim pageout write_page from fs fs_lock <-- deadlock This patch fixes it by using GFP_NOIO. In read path, we reorganize code flow so that kmap_atomic is called after the GFP_NOIO allocation. Cc: stable@vger.kernel.org Acked-by:
Pekka Enberg <penberg@kernel.org> Signed-off-by:
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H Hartley Sweeten authored
There are a number of pci vendor ids that are used in multiple drivers in the comedi subsystem. Move these ids to pci_ids.h. This also fixes some build warnings reported by the kbuild test robot about PCI_VENDOR_ID_AMPLICON being undeclared. Signed-off-by:
H Hartley Sweeten <hsweeten@visionengravers.com> Signed-off-by:
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Ian Abbott authored
Tuomas <tvainikk _at_ gmail _dot_ com> reported problems getting meaningful output from a Lab-PC+ in differential mode for AI cmds, but AI insn reads gave correct readings. He tracked it down to two problems, one of which is addressed by this patch. It seems the setting of the channel bits for particular scanning modes was incorrect for differential mode. (Only half the number of channels are available in differential mode; comedi refers to them as channels 0, 1, 2 and 3, but the hardware documentation refers to them as channels 0, 2, 4 and 6.) In differential mode, the setting of the channel enable bits in the command1 register should depend on whether the scan enable bit is set. Effectively, we need to double the comedi channel number when the scan enable bit is not set in differential mode. The scan enable bit gets set when the AI scan mode is `MODE_MULT_CHAN_UP` or `MODE_MULT_CHAN_DOWN`, and gets cleared when the AI scan mode is `MODE_SINGLE_CHAN` or `MODE_SINGLE_CHAN_INTERVAL`. The existing test for whether the comedi channel number needs to be doubled in differential mode is incorrect in `labpc_ai_cmd()`. This patch corrects the test. Thanks to Tuomas for suggesting the fix. Signed-off-by:
Ian Abbott <abbotti@mev.co.uk> Cc: <stable@vger.kernel.org> # 3.7.x, 3.8.x Signed-off-by:
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Ian Abbott authored
Tuomas <tvainikk _at_ gmail _dot_ com> reported problems getting meaningful output from a Lab-PC+ in differential mode for AI cmds, but AI insn reads gave correct readings. He tracked it down to two problems, one of which is addressed by this patch. It seems that writing to the command3 register after writing to the command4 register in `labpc_ai_cmd()` messes up the differential reference bit setting in the command4 register. Set up the command4 register after the command3 register (as in `labpc_ai_rinsn()`) to avoid the problem. Thanks to Tuomas for suggesting the fix. Signed-off-by:
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Ian Abbott authored
Don't allow comedi drivers to change `dev->hw_dev` using `comedi_set_hw_dev()` if it's already been set. Return `-EEXIST` in that case. `dev->hw_dev` needs to be set to NULL by the core during clean-up of the comedi device, so add a local function `comedi_clear_hw_dev()` to do that. Signed-off-by:
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Ian Abbott authored
Chnage the inline `comedi_set_hw_dev()` to an exported function and change it's return type from `void` to `int` so we can impose some restrictions (in a later patch) and return an error if necessary. Only a few comedi drivers call this, although they don't need to if the hardware device has been attached automatically via `comedi_auto_config()` and the comedi driver's `auto_attach()` method. Signed-off-by:
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Ian Abbott authored
`comedi_alloc_subdevice_minor()` doesn't really need a parameter pointing to a `struct comedi_device` as it can get this information from the parameter pointing to a `struct comedi_subdevice`. Just pass the subdevice parameter. Signed-by:
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Ian Abbott authored
Move the declarations of `comedi_alloc_subdevice_minor()` and `comedi_free_subdevice_minor()` from "comedidev.h" to "comedi_internal.h" since they are only of interest to the comedi core, and are not exported to the low-level comedi drivers. Signed-off-by:
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Garrick He authored
Fix all 'please, no space before tabs' warning found by checkpatch.pl Signed-off-by:
Garrick He <garrickhe@gmail.com> Signed-off-by:
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H Hartley Sweeten authored
Split the bus specific ISA/PC-104 and PCI code out of this driver and create two new drivers, das08_isa and das08_pci. This allows removing all the #ifdef'ery in the das08 driver that handled if the CONFIG_COMEDI_DAS08_{ISA,PCI} options were enabled. It also makes the PCI driver cleanly Plug-and-Play since the comedi driver only has an auto_attach callback. Previously it also had an attach callback in order to handle the ISA cards. Since the PCMCIA support was already split out, we can also remove the now unused enum das08_bustype and it's use in the boardinfo. The bus specific code deals with the bustype automatically before it calls the common attach function in das08. Signed-off-by: -
Andres More authored
Resolved 'do not use C99 // comments' checkpatch errors. Many warnings about odd indentation were left. Signed-off-by:
Andres More <more.andres@gmail.com> Signed-off-by:
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Andres More authored
Cleared 'do not use C99 // comments' checkpatch error in device.h and device_cfg.h Signed-off-by:
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Andres More authored
Cleared 'do not use C99 // comments' checkpatch error, several warnings about code indentation and camel casing were not resolved. Signed-off-by:
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Andres More authored
Cleared 'do not use C99 // comments' checkpatch errors in two headers. Several obvious comments were removed. Signed-off-by:
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Andres More authored
Switched // comments into respective /**/ ones Signed-off-by:
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Andres More authored
switched all // comments on file to respective /**/ Signed-off-by:
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H Hartley Sweeten authored
Convert this pcmcia driver to the comedi auto attach mechanism. This allows getting rid of the "hack" needed to pass the pcmcia_device pointer from the pcmcia_driver to the comedi_driver. We still need the boardinfo because ni_mio_common.c uses it. Cleanup ni_getboardtype() so it returns a pointer to the boardinto instead of the index. Signed-off-by:
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H Hartley Sweeten authored
Convert this pcmcia driver to the comedi auto attach mechanism. This allows getting rid of the "hack" needed to pass the pcmcia_device pointer from the pcmcia_driver to the comedi_driver. We still need the boardinfo because the ni_labpc driver uses it. But we can get rid of the duplicate that allowed attaching with the driver name. Signed-off-by:
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H Hartley Sweeten authored
This driver does not use anything from the interrupt.h, slab.h, and ioport.h headers. Don't bother including them. For aesthetic reasons, move the include of the comedi specific 8255.h header to the end of the includes. Signed-off-by:
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H Hartley Sweeten authored
Convert this pcmcia driver to the comedi auto attach mechanism. This allows getting rid of the "hack" needed to pass the pcmcia_device pointer from the pcmcia_driver to the comedi_driver as well as the now unnecessary boardinfo. Check the call to subdev_8255_init() for success. That function does a kzalloc and could return -ENOMEM. Signed-off-by:
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H Hartley Sweeten authored
Simplify the call to subdev_8255_cleanup() to remove the need for a local variable. This driver only attaches to pcmcia devices so the test for thisboard != pcmcia_bustype will always fail. Remove the test and the unreachable release_region(). This driver also never does a request_irq() so remove the free_irq(). Signed-off-by:
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H Hartley Sweeten authored
The LABPC_DEBUG define is not used in this driver. Just remove the Signed-off-by:
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H Hartley Sweeten authored
The comedi private data, struct dio24_private, is not used in the driver. Remove it and the kzalloc. Signed-off-by:
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H Hartley Sweeten authored
All the '#ifdef incomplete' code deals with interrupt support in this driver. For now just remove all this #if'defed out code. Signed-off-by:
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H Hartley Sweeten authored
The 'thisboard' macro relies on a local variable having a specific name and yields a pointer derived from that local variable. Replace the macro with a local variable and use the comedi_board() helper to get the pointer. Signed-off-by:
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H Hartley Sweeten authored
Move the comedi_driver declaration down in the file. This removes the need for the forward declarations. For aesthetic reasons, add some whitespace to the declaration. Signed-off-by:
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H Hartley Sweeten authored
The private data, struct local_info_t, is not being used in the driver. Remove it as well as the kzalloc/kfree. Also, don't set the 'pcmcia_cur_dev' variable unless the pcmcia probe is successful. Signed-off-by:
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H Hartley Sweeten authored
Absorb the code from dio24_config() into the probe function, dio24_cs_attach() and properly return the error code when the probe fails. This also gets rid of an unnecessary forward declaration. For aesthetic reasons, move the remove functio, dio24_cs_detach(), so it's after the probe function. Remove a number of dev_{level} noise messages in the probe/remove functions. Signed-off-by: -
H Hartley Sweeten authored
The pcmcia_driver suspend and resume functions in this driver don't do anything. Since they are optional just remove them. Signed-off-by:
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H Hartley Sweeten authored
The pcmcia_driver suspend and remove functions set the 'stop' variable and the resume function clears it. Nothing in the comedi_driver code uses the 'stop' variable. Just remove it so we can get rid of the suspend/resume. Signed-off-by:
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H Hartley Sweeten authored
This function simply calls pcmcia_disable_device(). Remove it and just call pcmcia_disable_device() where needed. Also, remove a couple unnecessary forward declarations. Signed-off-by:
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H Hartley Sweeten authored
For aesthetic reasons, reorder the pcmcia_driver variables and add some whitespace. Signed-off-by:
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H Hartley Sweeten authored
For aesthetic reasons, move all the MODULE_* information to the end of the file. Signed-off-by:
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Peter Huewe authored
XGI_P3cc is unused and the assignment without side effects -> remove; Data can be simply replaced by the Temp variable, which was changed to temp in order to make checkpatch happy. Signed-off-by:
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Peter Huewe authored
The code checks twice for if (pVBInfo->VBInfo & SetCRT2ToTV) without any changes in between -> we can remove the second check. And while at it we can also save the temp variable and use tempbx directly. Signed-off-by:
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Peter Huewe authored
Pindex and Pdata are unused -> remove tempbx is unused -> remove Signed-off-by:
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Peter Huewe authored
modeflag is unused in XGI_SetSeqRegs, XGI_GetTVInfo, XGI_SetLCDRegs, XGI_GetRatePtrCRT2 -> remove resinfo is unused in XGI_PreSetGroup1, XGI_SetGroup1, XGI_SetGroup2, XGI_SetLCDRegs -> remove push1,push2 are unused in XGI_SetLCDRegs -> remove CRT1Index is unused in XGI_PreSetGroup1, XGI_SetLockRegs, XGI_SetLCDRegs -> remove tempcx in XGI_PreSetGroup1 only holds the values 4,5,6 -> change its type to u8 crt2crtc is unused in XGI_SetGroup2 -> remove CRT2Index is unused in XGI_GetVCLK2Ptr -> remove. Assignment to i is dead in XGI_SetSeqRegs since it is not used before the next assignment -> remove the dead assignment. Signed-off-by:
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