These changes are the raw update to linux-4.4.6-rt14. Kernel sources

[kvmfornfv.git] / kernel / drivers / block / paride / pt.c

diff --git a/kernel/drivers/block/paride/pt.c b/kernel/drivers/block/paride/pt.c
index 2596042..1740d75 100644 (file)
--- a/kernel/drivers/block/paride/pt.c
+++ b/kernel/drivers/block/paride/pt.c
@@ -232,6 +232,7 @@ static int pt_identify(struct pt_unit *tape);
 static struct pt_unit pt[PT_UNITS];
 
 static char pt_scratch[512];   /* scratch block buffer */
+static void *par_drv;          /* reference of parport driver */
 
 /* kernel glue structures */
 
@@ -605,6 +606,12 @@ static int pt_detect(void)
 
        printk("%s: %s version %s, major %d\n", name, name, PT_VERSION, major);
 
+       par_drv = pi_register_driver(name);
+       if (!par_drv) {
+               pr_err("failed to register %s driver\n", name);
+               return -1;
+       }
+
        specified = 0;
        for (unit = 0; unit < PT_UNITS; unit++) {
                struct pt_unit *tape = &pt[unit];
@@ -644,6 +651,7 @@ static int pt_detect(void)
        if (found)
                return 0;
 
+       pi_unregister_driver(par_drv);
        printk("%s: No ATAPI tape drive detected\n", name);
        return -1;
 }