linux-kernel - [PATCH 5/9 next] scsi: Use iovec_import() instead of import

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Date:   Tue, 15 Sep 2020 14:55:24 +0000
From:   David Laight <David.Laight@...LAB.COM>
To:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "io-uring@...r.kernel.org" <io-uring@...r.kernel.org>,
        Jens Axboe <axboe@...nel.dk>,
        "David S. Miller" <davem@...emloft.net>,
        Al Viro <viro@...iv.linux.org.uk>,
        linux-fsdevel <linux-fsdevel@...r.kernel.org>
Subject: [PATCH 5/9 next] scsi: Use iovec_import() instead of import_iovec().


iovec_import() has a safer calling convention than import_iovec().

Signed-off-by: David Laight <david.laight@...lab.com>
---
 block/scsi_ioctl.c | 14 ++++++++------
 drivers/scsi/sg.c  | 14 +++++++-------
 2 files changed, 15 insertions(+), 13 deletions(-)

diff --git a/block/scsi_ioctl.c b/block/scsi_ioctl.c
index ef722f04f88a..0343918a84d3 100644
--- a/block/scsi_ioctl.c
+++ b/block/scsi_ioctl.c
@@ -331,20 +331,22 @@ static int sg_io(struct request_queue *q, struct gendisk *bd_disk,
 	ret = 0;
 	if (hdr->iovec_count) {
 		struct iov_iter i;
-		struct iovec *iov = NULL;
+		struct iovec *iov;
 
 #ifdef CONFIG_COMPAT
 		if (in_compat_syscall())
-			ret = compat_import_iovec(rq_data_dir(rq),
+			iov = compat_iovec_import(rq_data_dir(rq),
 				   hdr->dxferp, hdr->iovec_count,
-				   0, &iov, &i);
+				   NULL, &i);
 		else
 #endif
-			ret = import_iovec(rq_data_dir(rq),
+			iov = iovec_import(rq_data_dir(rq),
 				   hdr->dxferp, hdr->iovec_count,
-				   0, &iov, &i);
-		if (ret < 0)
+				   NULL, &i);
+		if (IS_ERR(iov)) {
+			ret = PTR_ERR(iov);
 			goto out_free_cdb;
+		}
 
 		/* SG_IO howto says that the shorter of the two wins */
 		iov_iter_truncate(&i, hdr->dxfer_len);
diff --git a/drivers/scsi/sg.c b/drivers/scsi/sg.c
index 20472aaaf630..1dbc0a74add5 100644
--- a/drivers/scsi/sg.c
+++ b/drivers/scsi/sg.c
@@ -1817,19 +1817,19 @@ sg_start_req(Sg_request *srp, unsigned char *cmd)
 	}
 
 	if (iov_count) {
-		struct iovec *iov = NULL;
+		struct iovec *iov;
 		struct iov_iter i;
 
 #ifdef CONFIG_COMPAT
 		if (in_compat_syscall())
-			res = compat_import_iovec(rw, hp->dxferp, iov_count,
-						  0, &iov, &i);
+			iov = compat_iovec_import(rw, hp->dxferp, iov_count,
+						  NULL, &i);
 		else
 #endif
-			res = import_iovec(rw, hp->dxferp, iov_count,
-					   0, &iov, &i);
-		if (res < 0)
-			return res;
+			iov = iovec_import(rw, hp->dxferp, iov_count,
+					   NULL, &i);
+		if (IS_ERR(iov))
+			return PTR_ERR(iov);
 
 		iov_iter_truncate(&i, hp->dxfer_len);
 		if (!iov_iter_count(&i)) {
-- 
2.25.1

-
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