ata: drop unused ata_id_is_lba_capacity_ok()

This function was renamed from lba_capacity_is_ok()() and moved from
drivers/ide/ to <linux/ata.h> but it never got used by libata, thus it
became useless after drivers/ide/ removal...

Signed-off-by: Sergey Shtylyov <s.shtylyov@omp.ru>
Signed-off-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>

1 files changed, 0 insertions, 50 deletions

diff --git a/include/linux/ata.h b/include/linux/ata.h
index 3240116647d5..c224dbddb9b2 100644
--- a/include/linux/ata.h
+++ b/include/linux/ata.h
@@ -1016,56 +1016,6 @@ static inline bool atapi_id_dmadir(const u16 *dev_id)
 	return ata_id_major_version(dev_id) >= 7 && (dev_id[62] & 0x8000);
 }
 
-/*
- * ata_id_is_lba_capacity_ok() performs a sanity check on
- * the claimed LBA capacity value for the device.
- *
- * Returns 1 if LBA capacity looks sensible, 0 otherwise.
- *
- * It is called only once for each device.
- */
-static inline bool ata_id_is_lba_capacity_ok(u16 *id)
-{
-	unsigned long lba_sects, chs_sects, head, tail;
-
-	/* No non-LBA info .. so valid! */
-	if (id[ATA_ID_CYLS] == 0)
-		return true;
-
-	lba_sects = ata_id_u32(id, ATA_ID_LBA_CAPACITY);
-
-	/*
-	 * The ATA spec tells large drives to return
-	 * C/H/S = 16383/16/63 independent of their size.
-	 * Some drives can be jumpered to use 15 heads instead of 16.
-	 * Some drives can be jumpered to use 4092 cyls instead of 16383.
-	 */
-	if ((id[ATA_ID_CYLS] == 16383 ||
-	     (id[ATA_ID_CYLS] == 4092 && id[ATA_ID_CUR_CYLS] == 16383)) &&
-	    id[ATA_ID_SECTORS] == 63 &&
-	    (id[ATA_ID_HEADS] == 15 || id[ATA_ID_HEADS] == 16) &&
-	    (lba_sects >= 16383 * 63 * id[ATA_ID_HEADS]))
-		return true;
-
-	chs_sects = id[ATA_ID_CYLS] * id[ATA_ID_HEADS] * id[ATA_ID_SECTORS];
-
-	/* perform a rough sanity check on lba_sects: within 10% is OK */
-	if (lba_sects - chs_sects < chs_sects/10)
-		return true;
-
-	/* some drives have the word order reversed */
-	head = (lba_sects >> 16) & 0xffff;
-	tail = lba_sects & 0xffff;
-	lba_sects = head | (tail << 16);
-
-	if (lba_sects - chs_sects < chs_sects/10) {
-		*(__le32 *)&id[ATA_ID_LBA_CAPACITY] = __cpu_to_le32(lba_sects);
-		return true;	/* LBA capacity is (now) good */
-	}
-
-	return false;	/* LBA capacity value may be bad */
-}
-
 static inline bool ata_ok(u8 status)
 {
 	return ((status & (ATA_BUSY | ATA_DRDY | ATA_DF | ATA_DRQ | ATA_ERR))