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nfit, nd_blk: BLK status register is only 32 bits

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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 <[email protected]>
Reported-by: Nicholas Moulin <[email protected]>
Tested-by: Nicholas Moulin <[email protected]>
Reviewed-by: Jeff Moyer <[email protected]>
Signed-off-by: Dan Williams <[email protected]>
This commit is contained in:
Ross Zwisler 2015-08-20 16:27:38 -06:00 • committed by Dan Williams
commit de4a196c02
1 changed files with 2 additions and 2 deletions
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4
drivers/acpi/nfit.c
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@ -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,