2 files changed, 10 insertions, 0 deletions

diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 4dc6befa5760..24b3bd63621f 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -2304,6 +2304,10 @@ int ata_dev_configure(struct ata_device *dev)
                 dev->max_sectors = ATA_MAX_SECTORS;
         }
 
+        if ((dev->class == ATA_DEV_ATAPI) &&
+            (atapi_command_packet_set(id) == TYPE_TAPE))
+                dev->max_sectors = ATA_MAX_SECTORS_TAPE;
+
         if (dev->horkage & ATA_HORKAGE_MAX_SEC_128)
                 dev->max_sectors = min_t(unsigned int, ATA_MAX_SECTORS_128,
                                          dev->max_sectors);
diff --git a/include/linux/ata.h b/include/linux/ata.h
index 128dc7ad4901..61535e72834d 100644
--- a/include/linux/ata.h
+++ b/include/linux/ata.h
@@ -43,6 +43,7 @@ enum {
         ATA_MAX_SECTORS_128     = 128,
         ATA_MAX_SECTORS         = 256,
         ATA_MAX_SECTORS_LBA48   = 65535,/* TODO: 65536? */
+        ATA_MAX_SECTORS_TAPE    = 65535,
 
         ATA_ID_WORDS            = 256,
         ATA_ID_SERNO            = 10,
@@ -544,6 +545,11 @@ static inline int atapi_cdb_len(const u16 *dev_id)
         }
 }
 
+static inline int atapi_command_packet_set(const u16 *dev_id)
+{
+        return (dev_id[0] >> 8) & 0x1f;
+}
+
 static inline int is_atapi_taskfile(const struct ata_taskfile *tf)
 {
         return (tf->protocol == ATA_PROT_ATAPI) ||