提交 0c144d0d 编写于 作者: P Philip Pokorny 提交者: Jeff Garzik

[PATCH] libata fix read capacity handling for more than 2TB

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上级 020f46a3
......@@ -1176,8 +1176,12 @@ unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf,
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 @@ unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf,
} 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);
......
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