1 files changed, 9 insertions, 1 deletions

diff --git a/include/linux/ide.h b/include/linux/ide.h
index 03dc2157a2b5..bba2f73b99a0 100644
--- a/include/linux/ide.h
+++ b/include/linux/ide.h
@@ -724,6 +724,12 @@ enum {
         PC_FLAG_TIMEDOUT                = (1 << 7),
 };
 
+/*
+ * With each packet command, we allocate a buffer of IDE_PC_BUFFER_SIZE bytes.
+ * This is used for several packet commands (not for READ/WRITE commands).
+ */
+#define IDE_PC_BUFFER_SIZE      256
+
 struct ide_atapi_pc {
         /* actual packet bytes */
         u8 c[12];
@@ -753,7 +759,7 @@ struct ide_atapi_pc {
          * those are more or less driver-specific and some of them are subject
          * to change/removal later.
          */
-        u8 pc_buf[256];
+        u8 pc_buf[IDE_PC_BUFFER_SIZE];
 
         /* idetape only */
         struct idetape_bh *bh;
@@ -1113,6 +1119,8 @@ void ide_pktcmd_tf_load(ide_drive_t *, u32, u16, u8);
 
 int ide_check_atapi_device(ide_drive_t *, const char *);
 
+void ide_init_pc(struct ide_atapi_pc *);
+
 ide_startstop_t ide_pc_intr(ide_drive_t *drive, struct ide_atapi_pc *pc,
         ide_handler_t *handler, unsigned int timeout, ide_expiry_t *expiry,
         void (*update_buffers)(ide_drive_t *, struct ide_atapi_pc *),