#ifndef _SELFTESTS_POWERPC_INSTRUCTIONS_H #define _SELFTESTS_POWERPC_INSTRUCTIONS_H #include #include /* This defines the "copy" instruction from Power ISA 3.0 Book II, section 4.4. */ #define __COPY(RA, RB, L) \ (0x7c00060c | (RA) << (31-15) | (RB) << (31-20) | (L) << (31-10)) #define COPY(RA, RB, L) \ .long __COPY((RA), (RB), (L)) static inline void copy(void *i) { asm volatile(str(COPY(0, %0, 0))";" : : "b" (i) : "memory" ); } static inline void copy_first(void *i) { asm volatile(str(COPY(0, %0, 1))";" : : "b" (i) : "memory" ); } /* This defines the "paste" instruction from Power ISA 3.0 Book II, section 4.4. */ #define __PASTE(RA, RB, L, RC) \ (0x7c00070c | (RA) << (31-15) | (RB) << (31-20) | (L) << (31-10) | (RC) << (31-31)) #define PASTE(RA, RB, L, RC) \ .long __PASTE((RA), (RB), (L), (RC)) static inline int paste(void *i) { int cr; asm volatile(str(PASTE(0, %1, 0, 0))";" "mfcr %0;" : "=r" (cr) : "b" (i) : "memory" ); return cr; } static inline int paste_last(void *i) { int cr; asm volatile(str(PASTE(0, %1, 1, 1))";" "mfcr %0;" : "=r" (cr) : "b" (i) : "memory" ); return cr; } #define PPC_INST_COPY __COPY(0, 0, 0) #define PPC_INST_COPY_FIRST __COPY(0, 0, 1) #define PPC_INST_PASTE __PASTE(0, 0, 0, 0) #define PPC_INST_PASTE_LAST __PASTE(0, 0, 1, 1) #endif /* _SELFTESTS_POWERPC_INSTRUCTIONS_H */ er
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authorChristoph Hellwig <hch@lst.de>2017-01-30 13:15:41 +0100
committerBjorn Helgaas <bhelgaas@google.com>2017-02-02 10:35:46 -0600
commitdfef358bd1beb4e7b5c94eca944be9cd23dfc752 (patch)
treeb9a2afb38a4c2ac8ad31f49ec0d71fe9e5b1994c /drivers/usb/common/common.c
parent030305d69fc6963c16003f50d7e8d74b02d0a143 (diff)
PCI/MSI: Don't apply affinity if there aren't enough vectors left
Bart reported a problem wіth an out of bounds access in the low-level IRQ affinity code, which we root caused to the qla2xxx driver assigning all its MSI-X vectors to the pre and post vectors, and not having any left for the actually spread IRQs. Fix this issue by not asking for affinity assignment when there are no vectors to assign left. Fixes: 402723ad5c62 ("PCI/MSI: Provide pci_alloc_irq_vectors_affinity()") Link: https://lkml.kernel.org/r/1485359225.3093.3.camel@sandisk.com Reported-by: Bart Van Assche <bart.vanassche@sandisk.com> Tested-by: Bart Van Assche <bart.vanassche@sandisk.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Diffstat (limited to 'drivers/usb/common/common.c')