From: Jonathan Corbet <corbet@lwn.net>
Date: Thu, 15 May 2008 18:23:19 +0000 (-0600)
Subject: osst: cdev lock_kernel() pushdown.
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=647d87bd1b9e7ff24f89b7d4e38c75d756018caa;p=GitHub%2FLineageOS%2Fandroid_kernel_samsung_universal7580.git

osst: cdev lock_kernel() pushdown.

Signed-off-by: Jonathan Corbet <corbet@lwn.net>
---

diff --git a/drivers/scsi/osst.c b/drivers/scsi/osst.c
index 31f7aec44d9..24ad89a649c 100644
--- a/drivers/scsi/osst.c
+++ b/drivers/scsi/osst.c
@@ -50,6 +50,7 @@ static const char * osst_version = "0.99.4";
 #include <linux/moduleparam.h>
 #include <linux/delay.h>
 #include <linux/jiffies.h>
+#include <linux/smp_lock.h>
 #include <asm/uaccess.h>
 #include <asm/dma.h>
 #include <asm/system.h>
@@ -4359,7 +4360,7 @@ os_bypass:
 
 
 /* Open the device */
-static int os_scsi_tape_open(struct inode * inode, struct file * filp)
+static int __os_scsi_tape_open(struct inode * inode, struct file * filp)
 {
 	unsigned short	      flags;
 	int		      i, b_size, new_session = 0, retval = 0;
@@ -4725,6 +4726,18 @@ err_out:
 	return retval;
 }
 
+/* BKL pushdown: spaghetti avoidance wrapper */
+static int os_scsi_tape_open(struct inode * inode, struct file * filp)
+{
+	int ret;
+
+	lock_kernel();
+	ret = __os_scsi_tape_open(inode, filp);
+	unlock_kernel();
+	return ret;
+}
+
+
 
 /* Flush the tape buffer before close */
 static int os_scsi_tape_flush(struct file * filp, fl_owner_t id)