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@xxxxxx>
---
include/linux/ata.h | 50 ---------------------------------------------
1 file changed, 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))
--
2.26.3
