[PATCH] libata fix read capacity handling for more than 2TB
This is a multi-part message in MIME format.
diff --git a/drivers/scsi/libata-scsi.c b/drivers/scsi/libata-scsi.c
index 7a4adc4..794fb55 100644
--- a/drivers/scsi/libata-scsi.c
+++ b/drivers/scsi/libata-scsi.c
@@ -1176,8 +1176,12 @@
n_sectors = ata_id_u32(args->id, 60);
n_sectors--; /* ATA TotalUserSectors - 1 */
- tmp = n_sectors; /* note: truncates, if lba48 */
if (args->cmd->cmnd[0] == READ_CAPACITY) {
+ if( n_sectors >= 0xffffffffULL )
+ tmp = 0xffffffff ; /* Return max count on overflow */
+ else
+ tmp = n_sectors ;
+
/* sector count, 32-bit */
rbuf[0] = tmp >> (8 * 3);
rbuf[1] = tmp >> (8 * 2);
@@ -1191,10 +1195,12 @@
} else {
/* sector count, 64-bit */
- rbuf[2] = n_sectors >> (8 * 7);
- rbuf[3] = n_sectors >> (8 * 6);
- rbuf[4] = n_sectors >> (8 * 5);
- rbuf[5] = n_sectors >> (8 * 4);
+ tmp = n_sectors >> (8 * 4);
+ rbuf[2] = tmp >> (8 * 3);
+ rbuf[3] = tmp >> (8 * 2);
+ rbuf[4] = tmp >> (8 * 1);
+ rbuf[5] = tmp;
+ tmp = n_sectors;
rbuf[6] = tmp >> (8 * 3);
rbuf[7] = tmp >> (8 * 2);
rbuf[8] = tmp >> (8 * 1);