kernel/linux.git/drivers/parisc, branch v5.10.78

parisc: Move pci_dev_is_behind_card_dino to where it is used

2021-09-26T12:08:59+00:00

[ Upstream commit 907872baa9f1538eed02ec737b8e89eba6c6e4b9 ] parisc build test images fail to compile with the following error. drivers/parisc/dino.c:160:12: error: 'pci_dev_is_behind_card_dino' defined but not used Move the function just ahead of its only caller to avoid the error. Fixes: 5fa1659105fa ("parisc: Disable HP HSC-PCI Cards to prevent kernel crash") Cc: Helge Deller Signed-off-by: Guenter Roeck Signed-off-by: Helge Deller Signed-off-by: Sasha Levin

dma-mapping: split

2020-10-06T05:07:03+00:00

Split out all the bits that are purely for dma_map_ops implementations and related code into a new header so that they don't get pulled into all the drivers. That also means the architecture specific is not pulled in by any more, which leads to a missing includes that were pulled in by the x86 or arm versions in a few not overly portable drivers. Signed-off-by: Christoph Hellwig

dma-mapping: add a new dma_alloc_pages API

2020-09-25T04:20:47+00:00

This API is the equivalent of alloc_pages, except that the returned memory is guaranteed to be DMA addressable by the passed in device. The implementation will also be used to provide a more sensible replacement for DMA_ATTR_NON_CONSISTENT flag. Additionally dma_alloc_noncoherent is switched over to use dma_alloc_pages as its backend. Signed-off-by: Christoph Hellwig Acked-by: Thomas Bogendoerfer (MIPS part)

dma-mapping: introduce dma_get_seg_boundary_nr_pages()

2020-09-03T16:12:15+00:00

We found that callers of dma_get_seg_boundary mostly do an ALIGN with page mask and then do a page shift to get number of pages: ALIGN(boundary + 1, 1 << shift) >> shift However, the boundary might be as large as ULONG_MAX, which means that a device has no specific boundary limit. So either "+ 1" or passing it to ALIGN() would potentially overflow. According to kernel defines: #define ALIGN_MASK(x, mask) (((x) + (mask)) & ~(mask)) #define ALIGN(x, a) ALIGN_MASK(x, (typeof(x))(a) - 1) We can simplify the logic here into a helper function doing: ALIGN(boundary + 1, 1 << shift) >> shift = ALIGN_MASK(b + 1, (1 << s) - 1) >> s = {[b + 1 + (1 << s) - 1] & ~[(1 << s) - 1]} >> s = [b + 1 + (1 << s) - 1] >> s = [b + (1 << s)] >> s = (b >> s) + 1 This patch introduces and applies dma_get_seg_boundary_nr_pages() as an overflow-free helper for the dma_get_seg_boundary() callers to get numbers of pages. It also takes care of the NULL dev case for non-DMA API callers. Suggested-by: Christoph Hellwig Signed-off-by: Nicolin Chen Acked-by: Niklas Schnelle Acked-by: Michael Ellerman (powerpc) Signed-off-by: Christoph Hellwig

Merge branch 'parisc-5.9-2' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux

2020-08-12T19:41:15+00:00

Pull more parisc updates from Helge Deller: - Oscar Carter contributed a patch which fixes parisc's usage of dereference_function_descriptor() and thus will allow using the -Wcast-function-type compiler option in the top-level Makefile - Sven Schnelle fixed a bug in the SBA code to prevent crashes during kexec - John David Anglin provided implementations for __smp_store_release() and __smp_load_acquire barriers() which avoids using the sync assembler instruction and thus speeds up barrier paths - Some whitespace cleanups in parisc's atomic.h header file * 'parisc-5.9-2' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux: parisc: Implement __smp_store_release and __smp_load_acquire barriers parisc: mask out enable and reserved bits from sba imask parisc: Whitespace cleanups in atomic.h parisc/kernel/ftrace: Remove function callback casts sections.h: dereference_function_descriptor() returns void pointer

parisc: mask out enable and reserved bits from sba imask

2020-08-12T01:55:40+00:00

When using kexec the SBA IOMMU IBASE might still have the RE bit set. This triggers a WARN_ON when trying to write back the IBASE register later, and it also makes some mask calculations fail. Cc: Signed-off-by: Sven Schnelle Signed-off-by: Helge Deller

docs: fix references for DMA*.txt files

2020-06-26T16:01:32+00:00

As we moved those files to core-api, fix references to point to their newer locations. Signed-off-by: Mauro Carvalho Chehab Link: https://lore.kernel.org/r/37b2fd159fbc7655dbf33b3eb1215396a25f6344.1592895969.git.mchehab+huawei@kernel.org Signed-off-by: Jonathan Corbet

parisc: Replace setup_irq() by request_irq()

2020-04-05T20:05:23+00:00

request_irq() is preferred over setup_irq(). Invocations of setup_irq() occur after memory allocators are ready. Per tglx[1], setup_irq() existed in olden days when allocators were not ready by the time early interrupts were initialized. Hence replace setup_irq() by request_irq(). [1] https://lkml.kernel.org/r/alpine.DEB.2.20.1710191609480.1971@nanos Signed-off-by: afzal mohammed Signed-off-by: Helge Deller

proc: convert everything to "struct proc_ops"

2020-02-04T03:05:26+00:00

The most notable change is DEFINE_SHOW_ATTRIBUTE macro split in seq_file.h. Conversion rule is: llseek => proc_lseek unlocked_ioctl => proc_ioctl xxx => proc_xxx delete ".owner = THIS_MODULE" line [akpm@linux-foundation.org: fix drivers/isdn/capi/kcapi_proc.c] [sfr@canb.auug.org.au: fix kernel/sched/psi.c] Link: http://lkml.kernel.org/r/20200122180545.36222f50@canb.auug.org.au Link: http://lkml.kernel.org/r/20191225172546.GB13378@avx2 Signed-off-by: Alexey Dobriyan Signed-off-by: Stephen Rothwell Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

remove ioremap_nocache and devm_ioremap_nocache

2020-01-06T08:45:59+00:00

ioremap has provided non-cached semantics by default since the Linux 2.6 days, so remove the additional ioremap_nocache interface. Signed-off-by: Christoph Hellwig Acked-by: Arnd Bergmann