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authorLinus Torvalds <torvalds@linux-foundation.org>2018-06-04 10:58:12 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2018-06-04 10:58:12 -0700
commite5a594643a3444d39c1467040e638bf08a4e0db8 (patch)
treee65c94ef60a51559db467055232ce1021ec263e1 /drivers/scsi
parentf956d08a56732c61a4d44e8034eeeedfc06fe721 (diff)
parent2550bbfd495227945e17ed1fa1c05bce4753b86b (diff)
Merge tag 'dma-mapping-4.18' of git://git.infradead.org/users/hch/dma-mapping
Pull dma-mapping updates from Christoph Hellwig: - replace the force_dma flag with a dma_configure bus method. (Nipun Gupta, although one patch is Ñ–ncorrectly attributed to me due to a git rebase bug) - use GFP_DMA32 more agressively in dma-direct. (Takashi Iwai) - remove PCI_DMA_BUS_IS_PHYS and rely on the dma-mapping API to do the right thing for bounce buffering. - move dma-debug initialization to common code, and apply a few cleanups to the dma-debug code. - cleanup the Kconfig mess around swiotlb selection - swiotlb comment fixup (Yisheng Xie) - a trivial swiotlb fix. (Dan Carpenter) - support swiotlb on RISC-V. (based on a patch from Palmer Dabbelt) - add a new generic dma-noncoherent dma_map_ops implementation and use it for arc, c6x and nds32. - improve scatterlist validity checking in dma-debug. (Robin Murphy) - add a struct device quirk to limit the dma-mask to 32-bit due to bridge/system issues, and switch x86 to use it instead of a local hack for VIA bridges. - handle devices without a dma_mask more gracefully in the dma-direct code. * tag 'dma-mapping-4.18' of git://git.infradead.org/users/hch/dma-mapping: (48 commits) dma-direct: don't crash on device without dma_mask nds32: use generic dma_noncoherent_ops nds32: implement the unmap_sg DMA operation nds32: consolidate DMA cache maintainance routines x86/pci-dma: switch the VIA 32-bit DMA quirk to use the struct device flag x86/pci-dma: remove the explicit nodac and allowdac option x86/pci-dma: remove the experimental forcesac boot option Documentation/x86: remove a stray reference to pci-nommu.c core, dma-direct: add a flag 32-bit dma limits dma-mapping: remove unused gfp_t parameter to arch_dma_alloc_attrs dma-debug: check scatterlist segments c6x: use generic dma_noncoherent_ops arc: use generic dma_noncoherent_ops arc: fix arc_dma_{map,unmap}_page arc: fix arc_dma_sync_sg_for_{cpu,device} arc: simplify arc_dma_sync_single_for_{cpu,device} dma-mapping: provide a generic dma-noncoherent implementation dma-mapping: simplify Kconfig dependencies riscv: add swiotlb support riscv: only enable ZONE_DMA32 for 64-bit ...
Diffstat (limited to 'drivers/scsi')
-rw-r--r--drivers/scsi/scsi_lib.c24
1 files changed, 2 insertions, 22 deletions
diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c
index f125fd71c0f2..fb38aeff9dbd 100644
--- a/drivers/scsi/scsi_lib.c
+++ b/drivers/scsi/scsi_lib.c
@@ -2149,27 +2149,6 @@ static int scsi_map_queues(struct blk_mq_tag_set *set)
return blk_mq_map_queues(set);
}
-static u64 scsi_calculate_bounce_limit(struct Scsi_Host *shost)
-{
- struct device *host_dev;
- u64 bounce_limit = 0xffffffff;
-
- if (shost->unchecked_isa_dma)
- return BLK_BOUNCE_ISA;
- /*
- * Platforms with virtual-DMA translation
- * hardware have no practical limit.
- */
- if (!PCI_DMA_BUS_IS_PHYS)
- return BLK_BOUNCE_ANY;
-
- host_dev = scsi_get_device(shost);
- if (host_dev && host_dev->dma_mask)
- bounce_limit = (u64)dma_max_pfn(host_dev) << PAGE_SHIFT;
-
- return bounce_limit;
-}
-
void __scsi_init_queue(struct Scsi_Host *shost, struct request_queue *q)
{
struct device *dev = shost->dma_dev;
@@ -2189,7 +2168,8 @@ void __scsi_init_queue(struct Scsi_Host *shost, struct request_queue *q)
}
blk_queue_max_hw_sectors(q, shost->max_sectors);
- blk_queue_bounce_limit(q, scsi_calculate_bounce_limit(shost));
+ if (shost->unchecked_isa_dma)
+ blk_queue_bounce_limit(q, BLK_BOUNCE_ISA);
blk_queue_segment_boundary(q, shost->dma_boundary);
dma_set_seg_boundary(dev, shost->dma_boundary);