[libata] replace ATA_QCFLAG_ATAPI with inline helper

Detection of an ATAPI taskfile is possible using a simple test
on existing information, so there is no need to cache this value
in a separate flag (ATA_QCFLAG_ATAPI).  Instead, create and use
a new helper function is_atapi_taskfile().

1 files changed, 6 insertions, 0 deletions

diff --git a/include/linux/ata.h b/include/linux/ata.h
index 919509f32327..38ccb84c039e 100644
--- a/include/linux/ata.h
+++ b/include/linux/ata.h
@@ -218,4 +218,10 @@ struct ata_taskfile {
 	  ((u64) dev->id[(n) + 1] << 16) |	\
 	  ((u64) dev->id[(n) + 0]) )
 
+static inline int is_atapi_taskfile(struct ata_taskfile *tf)
+{
+	return (tf->protocol == ATA_PROT_ATAPI) ||
+	       (tf->protocol == ATA_PROT_ATAPI_DMA);
+}
+
 #endif /* __LINUX_ATA_H__ */