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authorRoss Zwisler <ross.zwisler@linux.intel.com>2015-08-20 16:27:38 -0600
committerDan Williams <dan.j.williams@intel.com>2015-08-25 19:42:01 -0400
commitde4a196c02a2a2631b516d90da6e8d052ccb07e8 (patch)
treefe8c8914874372404e49d1f7c927fa66e8516087
parentcbfe8fa6cd672011c755c3cd85c9ffd4e2d10a6f (diff)
downloadlinux-de4a196c02a2a2631b516d90da6e8d052ccb07e8.tar.bz2
nfit, nd_blk: BLK status register is only 32 bits
Only read 32 bits for the BLK status register in read_blk_stat(). The format and size of this register is defined in the "NVDIMM Driver Writer's guide": http://pmem.io/documents/NVDIMM_Driver_Writers_Guide.pdf Signed-off-by: Ross Zwisler <ross.zwisler@linux.intel.com> Reported-by: Nicholas Moulin <nicholas.w.moulin@linux.intel.com> Tested-by: Nicholas Moulin <nicholas.w.moulin@linux.intel.com> Reviewed-by: Jeff Moyer <jmoyer@redhat.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
-rw-r--r--drivers/acpi/nfit.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/acpi/nfit.c b/drivers/acpi/nfit.c
index 628a42c41ab1..bb29e56276bd 100644
--- a/drivers/acpi/nfit.c
+++ b/drivers/acpi/nfit.c
@@ -1024,7 +1024,7 @@ static void wmb_blk(struct nfit_blk *nfit_blk)
wmb_pmem();
}
-static u64 read_blk_stat(struct nfit_blk *nfit_blk, unsigned int bw)
+static u32 read_blk_stat(struct nfit_blk *nfit_blk, unsigned int bw)
{
struct nfit_blk_mmio *mmio = &nfit_blk->mmio[DCR];
u64 offset = nfit_blk->stat_offset + mmio->size * bw;
@@ -1032,7 +1032,7 @@ static u64 read_blk_stat(struct nfit_blk *nfit_blk, unsigned int bw)
if (mmio->num_lines)
offset = to_interleave_offset(offset, mmio);
- return readq(mmio->base + offset);
+ return readl(mmio->base + offset);
}
static void write_blk_ctl(struct nfit_blk *nfit_blk, unsigned int bw,