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path: root/drivers/dma/moxart-dma.c
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* dmaengine: moxart-dma: remove redundant irqsave and irqrestore in hardIRQBarry Song2020-11-091-3/+2
| | | | | | | | | | Running in hardIRQ, disabling IRQ is redundant since hardIRQ has disabled IRQ. This patch removes the irqsave and irqstore to save some instruction cycles. Signed-off-by: Barry Song <song.bao.hua@hisilicon.com> Link: https://lore.kernel.org/r/20201027215252.25820-9-song.bao.hua@hisilicon.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
* dmaengine: Replace zero-length array with flexible-arrayGustavo A. R. Silva2020-06-151-1/+1
| | | | | | | | | | | | There is a regular need in the kernel to provide a way to declare having a dynamically sized set of trailing elements in a structure. Kernel code should always use “flexible array members”[1] for these cases. The older style of one-element or zero-length arrays should no longer be used[2]. [1] https://en.wikipedia.org/wiki/Flexible_array_member [2] https://github.com/KSPP/linux/issues/21 Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
* dmaengine: moxart-dma: Drop pointless static qualifier in moxart_probe()YueHaibing2020-05-131-1/+1
| | | | | | | | | There is no need to have the 'void __iomem *dma_base_addr' variable static since new value always be assigned before use it. Signed-off-by: YueHaibing <yuehaibing@huawei.com> Link: https://lore.kernel.org/r/20200505101353.195446-1-yuehaibing@huawei.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
* treewide: Use struct_size() for kmalloc()-familyKees Cook2018-06-061-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | One of the more common cases of allocation size calculations is finding the size of a structure that has a zero-sized array at the end, along with memory for some number of elements for that array. For example: struct foo { int stuff; void *entry[]; }; instance = kmalloc(sizeof(struct foo) + sizeof(void *) * count, GFP_KERNEL); Instead of leaving these open-coded and prone to type mistakes, we can now use the new struct_size() helper: instance = kmalloc(struct_size(instance, entry, count), GFP_KERNEL); This patch makes the changes for kmalloc()-family (and kvmalloc()-family) uses. It was done via automatic conversion with manual review for the "CHECKME" non-standard cases noted below, using the following Coccinelle script: // pkey_cache = kmalloc(sizeof *pkey_cache + tprops->pkey_tbl_len * // sizeof *pkey_cache->table, GFP_KERNEL); @@ identifier alloc =~ "kmalloc|kzalloc|kvmalloc|kvzalloc"; expression GFP; identifier VAR, ELEMENT; expression COUNT; @@ - alloc(sizeof(*VAR) + COUNT * sizeof(*VAR->ELEMENT), GFP) + alloc(struct_size(VAR, ELEMENT, COUNT), GFP) // mr = kzalloc(sizeof(*mr) + m * sizeof(mr->map[0]), GFP_KERNEL); @@ identifier alloc =~ "kmalloc|kzalloc|kvmalloc|kvzalloc"; expression GFP; identifier VAR, ELEMENT; expression COUNT; @@ - alloc(sizeof(*VAR) + COUNT * sizeof(VAR->ELEMENT[0]), GFP) + alloc(struct_size(VAR, ELEMENT, COUNT), GFP) // Same pattern, but can't trivially locate the trailing element name, // or variable name. @@ identifier alloc =~ "kmalloc|kzalloc|kvmalloc|kvzalloc"; expression GFP; expression SOMETHING, COUNT, ELEMENT; @@ - alloc(sizeof(SOMETHING) + COUNT * sizeof(ELEMENT), GFP) + alloc(CHECKME_struct_size(&SOMETHING, ELEMENT, COUNT), GFP) Signed-off-by: Kees Cook <keescook@chromium.org>
* dmaengine: moxart: remove NO_IRQArnd Bergmann2016-09-051-1/+1
| | | | | | | | The use of NO_IRQ is incorrect here and should never have been there, as irq_of_parse_and_map() returns '0' on failure, not NO_IRQ. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
* dmaengine: moxart-dma: explicitly freeup irqVinod Koul2016-07-161-0/+4
| | | | | | | | | | | dmaengine device should explicitly call devm_free_irq() when using devm_request_irq(). The irq is still ON when devices remove is executed and irq should be quiesced before remove is completed. Signed-off-by: Vinod Koul <vinod.koul@intel.com> Cc: Jonas Jensen <jonas.jensen@gmail.com>
* dmaengine: Remove site specific OOM error messages on kzallocPeter Griffin2016-06-211-3/+1
| | | | | | | | | | If kzalloc() fails it will issue it's own error message including a dump_stack(). So remove the site specific error messages. Signed-off-by: Peter Griffin <peter.griffin@linaro.org> Acked-by: Jon Hunter <jonathanh@nvidia.com> Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
* dmaengine: moxart-dma: Fix module autoload for OF platform driverLuis de Bethencourt2015-10-011-0/+1
| | | | | | | | This platform driver has a OF device ID table but the OF module alias information is not created so module autoloading won't work. Signed-off-by: Luis de Bethencourt <luisbg@osg.samsung.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
* dmaengine: moxart-dma: Fix memory leak when stopping a running transferPeter Ujfalusi2015-03-301-1/+3
| | | | | | | | The vd->node is removed from the lists when the transfer started so the vchan_get_all_descriptors() will not find it. This results memory leak. Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
* dmaengine: moxart: Split device_controlMaxime Ripard2014-12-221-23/+2
| | | | | | | | | Split the device_control callback of the Moxart DMA driver to make use of the newly introduced callbacks, that will eventually be used to retrieve slave capabilities. Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
* dma: drop owner assignment from platform_driversWolfram Sang2014-10-201-1/+0
| | | | | | | A platform_driver does not need to set an owner, it will be populated by the driver core. Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
* dmaengine: Add MOXA ART DMA engine driverJonas Jensen2014-01-201-0/+699
The MOXA ART SoC has a DMA controller capable of offloading expensive memory operations, such as large copies. This patch adds support for the controller including four channels. Two of these are used to handle MMC copy on the UC-7112-LX hardware. The remaining two can be used in a future audio driver or client application. Signed-off-by: Jonas Jensen <jonas.jensen@gmail.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
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