Merge branch 'for-3.19-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj...

[mirror_ubuntu-artful-kernel.git] / include / linux / libata.h

diff --git a/include/linux/libata.h b/include/linux/libata.h
index 91f705de2c0be743dac06dac565817516058fc56..61df823ac86a24efd97f6806f71f9dad1f25101a 100644 (file)
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -1340,6 +1340,12 @@ extern const struct ata_port_operations ata_base_port_ops;
 extern const struct ata_port_operations sata_port_ops;
 extern struct device_attribute *ata_common_sdev_attrs[];
 
+/*
+ * All sht initializers (BASE, PIO, BMDMA, NCQ) must be instantiated
+ * by the edge drivers.  Because the 'module' field of sht must be the
+ * edge driver's module reference, otherwise the driver can be unloaded
+ * even if the scsi_device is being accessed.
+ */
 #define ATA_BASE_SHT(drv_name)                                 \
        .module                 = THIS_MODULE,                  \
        .name                   = drv_name,                     \