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

are taken from kernel.org, and rt patch from the rt wiki download page.

During the rebasing, the following patch collided:

Force tick interrupt and get rid of softirq magic(I70131fb85).

Collisions have been removed because its logic was found on the
source already.

Change-Id: I7f57a4081d9deaa0d9ccfc41a6c8daccdee3b769
Signed-off-by: José Pekkarinen <jose.pekkarinen@nokia.com>

1 files changed, 14 insertions, 4 deletions

diff --git a/kernel/drivers/block/paride/pd.c b/kernel/drivers/block/paride/pd.c
index d48715b28..562b5a4ca 100644
--- a/kernel/drivers/block/paride/pd.c
+++ b/kernel/drivers/block/paride/pd.c
@@ -247,6 +247,8 @@ static char *pd_errs[17] = { "ERR", "INDEX", "ECC", "DRQ", "SEEK", "WRERR",
 	"IDNF", "MC", "UNC", "???", "TMO"
 };
 
+static void *par_drv;		/* reference of parport driver */
+
 static inline int status_reg(struct pd_unit *disk)
 {
 	return pi_read_regr(disk->pi, 1, 6);
@@ -442,7 +444,7 @@ static char *pd_buf;		/* buffer for request in progress */
 
 static enum action do_pd_io_start(void)
 {
-	if (pd_req->cmd_type == REQ_TYPE_SPECIAL) {
+	if (pd_req->cmd_type == REQ_TYPE_DRV_PRIV) {
 		phase = pd_special;
 		return pd_special();
 	}
@@ -721,11 +723,11 @@ static int pd_special_command(struct pd_unit *disk,
 	struct request *rq;
 	int err = 0;
 
-	rq = blk_get_request(disk->gd->queue, READ, __GFP_WAIT);
+	rq = blk_get_request(disk->gd->queue, READ, __GFP_RECLAIM);
 	if (IS_ERR(rq))
 		return PTR_ERR(rq);
 
-	rq->cmd_type = REQ_TYPE_SPECIAL;
+	rq->cmd_type = REQ_TYPE_DRV_PRIV;
 	rq->special = func;
 
 	err = blk_execute_rq(disk->gd->queue, disk->gd, rq, 0);
@@ -872,6 +874,12 @@ static int pd_detect(void)
 			pd_drive_count++;
 	}
 
+	par_drv = pi_register_driver(name);
+	if (!par_drv) {
+		pr_err("failed to register %s driver\n", name);
+		return -1;
+	}
+
 	if (pd_drive_count == 0) { /* nothing spec'd - so autoprobe for 1 */
 		disk = pd;
 		if (pi_init(disk->pi, 1, -1, -1, -1, -1, -1, pd_scratch,
@@ -902,8 +910,10 @@ static int pd_detect(void)
 			found = 1;
 		}
 	}
-	if (!found)
+	if (!found) {
 		printk("%s: no valid drive found\n", name);
+		pi_unregister_driver(par_drv);
+	}
 	return found;
 }