The value we get from the low byte of the ATA_ID_SECTOR_SIZE word is not not
a plain multiple, but the log of it, so fix the helper to give the correct
answer. Without this we'll get an incorrect minimal I/O size in the block
limits VPD page for 4k sector drives.
Signed-off-by: Christoph Hellwig <hch@xxxxxx>
Index: linux-2.6/include/linux/ata.h
===================================================================
--- linux-2.6.orig/include/linux/ata.h 2010-01-28 11:17:41.968003842 +0100
+++ linux-2.6/include/linux/ata.h 2010-01-28 11:20:02.355268610 +0100
@@ -649,7 +649,7 @@ static inline int ata_id_has_large_logic
static inline u8 ata_id_logical_per_physical_sectors(const u16 *id)
{
- return id[ATA_ID_SECTOR_SIZE] & 0xf;
+ return 1 << (id[ATA_ID_SECTOR_SIZE] & 0xf);
}
static inline int ata_id_has_lba48(const u16 *id)
--
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