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H A D | siw_qp_tx.c | 0d1b756a Fri Sep 02 16:59:18 CDT 2022 Linus Walleij <linus.walleij@linaro.org> RDMA/siw: Pass a pointer to virt_to_page()
Functions that work on a pointer to virtual memory such as virt_to_pfn() and users of that function such as virt_to_page() are supposed to pass a pointer to virtual memory, ideally a (void *) or other pointer. However since many architectures implement virt_to_pfn() as a macro, this function becomes polymorphic and accepts both a (unsigned long) and a (void *).
If we instead implement a proper virt_to_pfn(void *addr) function the following happens (occurred on arch/arm):
drivers/infiniband/sw/siw/siw_qp_tx.c:32:23: warning: incompatible integer to pointer conversion passing 'dma_addr_t' (aka 'unsigned int') to parameter of type 'const void *' [-Wint-conversion] drivers/infiniband/sw/siw/siw_qp_tx.c:32:37: warning: passing argument 1 of 'virt_to_pfn' makes pointer from integer without a cast [-Wint-conversion] drivers/infiniband/sw/siw/siw_qp_tx.c:538:36: warning: incompatible integer to pointer conversion passing 'unsigned long long' to parameter of type 'const void *' [-Wint-conversion]
Fix this with an explicit cast. In one case where the SIW SGE uses an unaligned u64 we need a double cast modifying the virtual address (va) to a platform-specific uintptr_t before casting to a (void *).
Fixes: b9be6f18cf9e ("rdma/siw: transmit path") Cc: linux-rdma@vger.kernel.org Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Link: https://lore.kernel.org/r/20220902215918.603761-1-linus.walleij@linaro.org Signed-off-by: Leon Romanovsky <leon@kernel.org>
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