From: Anton Blanchard <anton@samba.org>
Date: Fri, 26 Oct 2007 12:00:14 +0000 (+0200)
Subject: Initialise scatter/gather list in sg driver
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=30fa0d0f0c0ab2aa0d4c2f88eda49eaa19ea6f8d;p=GitHub%2Fexynos8895%2Fandroid_kernel_samsung_universal8895.git

Initialise scatter/gather list in sg driver

After turning on DEBUG_SG I hit a fail:

kernel BUG at include/linux/scatterlist.h:50!

	sg_build_indirect
	sg_build_reserve
	sg_open
	chrdev_open
	__dentry_open
	do_filp_open
	do_sys_open

We should initialise the sg list when we allocate it in sg_build_sgat.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
---

diff --git a/drivers/scsi/sg.c b/drivers/scsi/sg.c
index b5fa4f091387..f1871ea04045 100644
--- a/drivers/scsi/sg.c
+++ b/drivers/scsi/sg.c
@@ -1652,6 +1652,7 @@ sg_build_sgat(Sg_scatter_hold * schp, const Sg_fd * sfp, int tablesize)
 	schp->buffer = kzalloc(sg_bufflen, gfp_flags);
 	if (!schp->buffer)
 		return -ENOMEM;
+	sg_init_table(schp->buffer, tablesize);
 	schp->sglist_len = sg_bufflen;
 	return tablesize;	/* number of scat_gath elements allocated */
 }