#
fd1cb31a |
|
17-Aug-2023 |
Kees Cook <keescook@chromium.org> |
dmaengine: moxart-dma: Annotate struct moxart_desc with __counted_by Prepare for the coming implementation by GCC and Clang of the __counted_by attribute. Flexible array members annotated with __counted_by can have their accesses bounds-checked at run-time checking via CONFIG_UBSAN_BOUNDS (for array indexing) and CONFIG_FORTIFY_SOURCE (for strcpy/memcpy-family functions). As found with Coccinelle[1], add __counted_by for struct moxart_desc. Additionally, since the element count member must be set before accessing the annotated flexible array member, move its initialization earlier. [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci Cc: Vinod Koul <vkoul@kernel.org> Cc: dmaengine@vger.kernel.org Signed-off-by: Kees Cook <keescook@chromium.org> Reviewed-by: "Gustavo A. R. Silva" <gustavoars@kernel.org> Link: https://lore.kernel.org/r/20230817235859.49846-6-keescook@chromium.org Signed-off-by: Vinod Koul <vkoul@kernel.org>
|
#
1a65831f |
|
19-Sep-2023 |
Uwe Kleine-König <u.kleine-koenig@pengutronix.de> |
dmaengine: moxart-dma: Convert to platform remove callback returning void The .remove() callback for a platform driver returns an int which makes many driver authors wrongly assume it's possible to do error handling by returning an error code. However the value returned is ignored (apart from emitting a warning) and this typically results in resource leaks. To improve here there is a quest to make the remove callback return void. In the first step of this quest all drivers are converted to .remove_new() which already returns void. Eventually after all drivers are converted, .remove_new() is renamed to .remove(). Trivially convert this driver from always returning zero in the remove callback to the void returning variant. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Link: https://lore.kernel.org/r/20230919133207.1400430-28-u.kleine-koenig@pengutronix.de Signed-off-by: Vinod Koul <vkoul@kernel.org>
|
#
4b23603a |
|
10-Nov-2022 |
Tudor Ambarus <tudor.ambarus@linaro.org> |
dmaengine: drivers: Use devm_platform_ioremap_resource() platform_get_resource() and devm_ioremap_resource() are wrapped up in the devm_platform_ioremap_resource() helper. Use the helper and get rid of the local variable for struct resource *. We now have a function call less. Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com> Acked-by: Jernej Skrabec <jernej.skrabec@gmail.com> Acked-by: Peter Ujfalusi <peter.ujfalusi@gmail.com> Link: https://lore.kernel.org/r/20221110152528.7821-1-tudor.ambarus@microchip.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
|
#
3bb16560 |
|
07-Jun-2022 |
Thomas Gleixner <tglx@linutronix.de> |
treewide: Replace GPLv2 boilerplate/reference with SPDX - gpl-2.0_56.RULE (part 2) Based on the normalized pattern: this file is licensed under the terms of the gnu general public license version 2 this program is licensed as is without any warranty of any kind whether express or implied extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
#
8c94b83e |
|
27-Oct-2020 |
Barry Song <song.bao.hua@hisilicon.com> |
dmaengine: moxart-dma: remove redundant irqsave and irqrestore in hardIRQ 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>
|
#
466f966b |
|
28-May-2020 |
Gustavo A. R. Silva <gustavoars@kernel.org> |
dmaengine: Replace zero-length array with flexible-array 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>
|
#
c794f7ed |
|
05-May-2020 |
YueHaibing <yuehaibing@huawei.com> |
dmaengine: moxart-dma: Drop pointless static qualifier in moxart_probe() 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>
|
#
acafe7e3 |
|
08-May-2018 |
Kees Cook <keescook@chromium.org> |
treewide: Use struct_size() for kmalloc()-family 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>
|
#
2d9e31b9 |
|
02-Sep-2016 |
Arnd Bergmann <arnd@arndb.de> |
dmaengine: moxart: remove NO_IRQ 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>
|
#
144fa37f |
|
04-Jul-2016 |
Vinod Koul <vkoul@kernel.org> |
dmaengine: moxart-dma: explicitly freeup irq 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>
|
#
aef94fea |
|
07-Jun-2016 |
Peter Griffin <peter.griffin@linaro.org> |
dmaengine: Remove site specific OOM error messages on kzalloc 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>
|
#
981ec2b2 |
|
16-Sep-2015 |
Luis de Bethencourt <luis@debethencourt.com> |
dmaengine: moxart-dma: Fix module autoload for OF platform driver 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>
|
#
fbef403a |
|
27-Mar-2015 |
Peter Ujfalusi <peter.ujfalusi@ti.com> |
dmaengine: moxart-dma: Fix memory leak when stopping a running transfer 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>
|
#
ac850cc7 |
|
17-Nov-2014 |
Maxime Ripard <mripard@kernel.org> |
dmaengine: moxart: Split device_control 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>
|
#
55f04d7f |
|
20-Oct-2014 |
Wolfram Sang <wsa@kernel.org> |
dma: drop owner assignment from platform_drivers 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>
|
#
5f9e685a |
|
17-Jan-2014 |
Jonas Jensen <jonas.jensen@gmail.com> |
dmaengine: Add MOXA ART DMA engine driver 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>
|