kernel/linux.git/drivers/fpga, branch v6.12.80

fpga: dfl: use subsys_initcall to allow built-in drivers to be added

2026-03-04T12:21:36+00:00

[ Upstream commit 267f53140c9d0bf270bbe0148082e9b8e5011273 ] The dfl code adds a bus. If it is built-in and there is a built-in driver as well, the dfl module_init may be called after the driver module_init, leading to a failure to register the driver as the bus has not been added yet. Use subsys_initcall, which guarantees it will be called before the drivers init code. Without the fix, we see failures like this: [ 0.479475] Driver 'intel-m10-bmc' was unable to register with bus_type 'dfl' because the bus was not initialized. Cc: stable@vger.kernel.org Fixes: 9ba3a0aa09fe ("fpga: dfl: create a dfl bus type to support DFL devices") Signed-off-by: Thadeu Lima de Souza Cascardo Link: https://lore.kernel.org/r/20251215-dfl_subsys-v1-1-21807bad6b10@igalia.com Reviewed-by: Xu Yilun Signed-off-by: Xu Yilun Signed-off-by: Sasha Levin

fpga: of-fpga-region: Fail if any bridge is missing

2026-03-04T12:21:23+00:00

[ Upstream commit c141c8221bc5089de915d9f26044df892c343c7e ] When parsing the region bridge list from the "fpga-bridges" device tree property, the of-fpga-region driver will silently ignore bridges which fail to be obtained, for example due to a missing bridge driver or invalid phandle. This can lead to hardware issues if a region bridge stays coupled when partial programming is performed. Fail if any of the bridges specified in "fpga-bridges" cannot be obtained. Signed-off-by: Romain Gantois Link: https://lore.kernel.org/r/20251127-of-fpga-region-fail-if-bridges-not-found-v1-1-ca674f8d07eb@bootlin.com Reviewed-by: Xu Yilun Signed-off-by: Xu Yilun Signed-off-by: Sasha Levin

fpga: zynq_fpga: Fix the wrong usage of dma_map_sgtable()

2025-08-28T14:31:08+00:00

commit 1ca61060de92a4320d73adfe5dc8d335653907ac upstream. dma_map_sgtable() returns only 0 or the error code. Read sgt->nents to get the number of mapped segments. Fixes: 37e00703228a ("zynq_fpga: use sgtable-based scatterlist wrappers") Reported-by: Pavel Pisa Closes: https://lore.kernel.org/linux-fpga/202508041548.22955.pisa@fel.cvut.cz/ Reviewed-by: Jason Gunthorpe Reviewed-by: Marek Szyprowski Signed-off-by: Xu Yilun Tested-by: Pavel Pisa Link: https://lore.kernel.org/r/20250806070605.1920909-2-yilun.xu@linux.intel.com Signed-off-by: Greg Kroah-Hartman

zynq_fpga: use sgtable-based scatterlist wrappers

2025-08-28T14:30:57+00:00

commit 37e00703228ab44d0aacc32a97809a4f6f58df1b upstream. Use common wrappers operating directly on the struct sg_table objects to fix incorrect use of statterlists related calls. dma_unmap_sg() function has to be called with the number of elements originally passed to the dma_map_sg() function, not the one returned in sgtable's nents. CC: stable@vger.kernel.org Fixes: 425902f5c8e3 ("fpga zynq: Use the scatterlist interface") Signed-off-by: Marek Szyprowski Reviewed-by: Jason Gunthorpe Reviewed-by: Xu Yilun Link: https://lore.kernel.org/r/20250616120932.1090614-1-m.szyprowski@samsung.com Signed-off-by: Xu Yilun Signed-off-by: Greg Kroah-Hartman

fpga: fix potential null pointer deref in fpga_mgr_test_img_load_sgt()

2025-06-19T13:32:13+00:00

[ Upstream commit 6ebf1982038af12f3588417e4fd0417d2551da28 ] fpga_mgr_test_img_load_sgt() allocates memory for sgt using kunit_kzalloc() however it does not check if the allocation failed. It then passes sgt to sg_alloc_table(), which passes it to __sg_alloc_table(). This function calls memset() on sgt in an attempt to zero it out. If the allocation fails then sgt will be NULL and the memset will trigger a NULL pointer dereference. Fix this by checking the allocation with KUNIT_ASSERT_NOT_ERR_OR_NULL(). Reviewed-by: Marco Pagani Fixes: ccbc1c302115 ("fpga: add an initial KUnit suite for the FPGA Manager") Signed-off-by: Qasim Ijaz Acked-by: Xu Yilun Link: https://lore.kernel.org/r/20250422153737.5264-1-qasdev00@gmail.com Signed-off-by: Xu Yilun Signed-off-by: Sasha Levin

fpga: altera-cvp: Increase credit timeout

2025-05-29T09:02:34+00:00

[ Upstream commit 0f05886a40fdc55016ba4d9ae0a9c41f8312f15b ] Increase the timeout for SDM (Secure device manager) data credits from 20ms to 40ms. Internal stress tests running at 500 loops failed with the current timeout of 20ms. At the start of a FPGA configuration, the CVP host driver reads the transmit credits from SDM. It then sends bitstream FPGA data to SDM based on the total credits. Each credit allows the CVP host driver to send 4kBytes of data. There are situations whereby, the SDM did not respond in time during testing. Signed-off-by: Ang Tien Sung Signed-off-by: Kuhanh Murugasen Krishnan Acked-by: Xu Yilun Link: https://lore.kernel.org/r/20250212221249.2715929-1-tien.sung.ang@intel.com Signed-off-by: Xu Yilun Signed-off-by: Sasha Levin

move asm/unaligned.h to linux/unaligned.h

2024-10-02T21:23:23+00:00

asm/unaligned.h is always an include of asm-generic/unaligned.h; might as well move that thing to linux/unaligned.h and include that - there's nothing arch-specific in that header. auto-generated by the following: for i in `git grep -l -w asm/unaligned.h`; do sed -i -e "s/asm\/unaligned.h/linux\/unaligned.h/" $i done for i in `git grep -l -w asm-generic/unaligned.h`; do sed -i -e "s/asm-generic\/unaligned.h/linux\/unaligned.h/" $i done git mv include/asm-generic/unaligned.h include/linux/unaligned.h git mv tools/include/asm-generic/unaligned.h tools/include/linux/unaligned.h sed -i -e "/unaligned.h/d" include/asm-generic/Kbuild sed -i -e "s/__ASM_GENERIC/__LINUX/" include/linux/unaligned.h tools/include/linux/unaligned.h

fpga: zynq-fpga: Rename 'timeout' variable as 'time_left'

2024-08-14T15:58:14+00:00

There is a confusing pattern in the kernel to use a variable named 'timeout' to store the result of wait_for_completion_timeout() causing patterns like: timeout = wait_for_completion_timeout(...) if (!timeout) return -ETIMEDOUT; with all kinds of permutations. Use 'time_left' as a variable to make the code self explaining. Signed-off-by: Wolfram Sang Acked-by: Michal Simek Acked-by: Xu Yilun Link: https://lore.kernel.org/r/20240729104319.2658-2-wsa+renesas@sang-engineering.com Signed-off-by: Xu Yilun

fpga: socfpga: Rename 'timeout' variable as 'time_left'

2024-08-14T15:57:07+00:00

There is a confusing pattern in the kernel to use a variable named 'timeout' to store the result of wait_for_completion_interruptible_timeout() causing patterns like: timeout = wait_for_completion_interruptible_timeout(...) if (!timeout) return -ETIMEDOUT; with all kinds of permutations. Use 'time_left' as a variable to make the code self explaining. Fix to the proper variable type 'long' while here. Signed-off-by: Wolfram Sang Acked-by: Xu Yilun Link: https://lore.kernel.org/r/20240729104319.2658-1-wsa+renesas@sang-engineering.com Signed-off-by: Xu Yilun

fpga: Simplify and improve fpga region test using deferred actions

2024-08-14T15:51:04+00:00

Use deferred actions to simplify the test suite and avoid potential memory leaks when test cases fail. Remove unnecessary calls to kunit_device_unregister() since kunit devices are tied to the test context and released by a deferred action when the test is completed. Other changes: fix a typo by changing the test suite name to fpga_region in the kunit_suite struct. Signed-off-by: Marco Pagani Acked-by: Xu Yilun Link: https://lore.kernel.org/r/20240725125031.308195-4-marpagan@redhat.com Signed-off-by: Xu Yilun