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authorMatthew Wilcox <matthew.r.wilcox@intel.com>2013-03-28 05:28:22 +0400
committerMatthew Wilcox <matthew.r.wilcox@intel.com>2013-04-16 23:05:22 +0400
commit063cc6d5591ea9c0631b81ac5c7b829d99738b2f (patch)
tree5a61528a0a76394666fdc42d6b51bf576a7c1002 /include/linux/nvme.h
parentacb7aa0db09b8abd38abeb84334a8a27a52fbb1b (diff)
downloadlinux-063cc6d5591ea9c0631b81ac5c7b829d99738b2f.tar.xz
NVMe: Abstract out sector to block number conversion
Introduce nvme_block_nr() to help convert sectors to block numbers. This fixes an integer overflow in the SCSI conversion layer, and it's slightly less typing than opencoding it. Signed-off-by: Matthew Wilcox <matthew.r.wilcox@intel.com> Acked-by: Keith Busch <keith.busch@intel.com>
Diffstat (limited to 'include/linux/nvme.h')
-rw-r--r--include/linux/nvme.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/include/linux/nvme.h b/include/linux/nvme.h
index aa575033dbe7..09f419d4da4e 100644
--- a/include/linux/nvme.h
+++ b/include/linux/nvme.h
@@ -566,6 +566,11 @@ struct nvme_iod {
struct scatterlist sg[0];
};
+static inline u64 nvme_block_nr(struct nvme_ns *ns, sector_t sector)
+{
+ return (sector >> (ns->lba_shift - 9));
+}
+
/**
* nvme_free_iod - frees an nvme_iod
* @dev: The device that the I/O was submitted to