[PATCH 06/24] scsi: remove scsi_compat_ioctl

From: Christoph Hellwig <hch@lst.de>
To: "Martin K. Petersen" <martin.petersen@oracle.com>,
	Jens Axboe <axboe@kernel.dk>,
	FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Cc: "Doug Gilbert" <dgilbert@interlog.com>,
	"Kai Mäkisara" <Kai.Makisara@kolumbus.fi>,
	linux-block@vger.kernel.org, linux-scsi@vger.kernel.org
Subject: [PATCH 06/24] scsi: remove scsi_compat_ioctl
Date: Mon, 12 Jul 2021 07:47:58 +0200	[thread overview]
Message-ID: <20210712054816.4147559-7-hch@lst.de> (raw)
In-Reply-To: <20210712054816.4147559-1-hch@lst.de>

Just handle the compat case in scsi_ioctl using in_compat_syscall().

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 drivers/scsi/ch.c         |  2 --
 drivers/scsi/scsi_ioctl.c | 60 +++++++++++++--------------------------
 drivers/scsi/sd.c         |  2 --
 drivers/scsi/sg.c         |  3 --
 drivers/scsi/sr.c         |  5 +---
 drivers/scsi/st.c         |  2 +-
 include/scsi/scsi_ioctl.h |  1 -
 7 files changed, 22 insertions(+), 53 deletions(-)

diff --git a/drivers/scsi/ch.c b/drivers/scsi/ch.c
index e89f226cae5c..87df8cd880e0 100644
--- a/drivers/scsi/ch.c
+++ b/drivers/scsi/ch.c
@@ -877,8 +877,6 @@ static long ch_ioctl(struct file *file,
 	}
 
 	default:
-		if (in_compat_syscall())
-			return scsi_compat_ioctl(ch->device, cmd, argp);
 		return scsi_ioctl(ch->device, cmd, argp);
 
 	}
diff --git a/drivers/scsi/scsi_ioctl.c b/drivers/scsi/scsi_ioctl.c
index 0d13610cd6bf..7b2e3cc85e66 100644
--- a/drivers/scsi/scsi_ioctl.c
+++ b/drivers/scsi/scsi_ioctl.c
@@ -189,8 +189,17 @@ static int scsi_ioctl_get_pci(struct scsi_device *sdev, void __user *arg)
 		? -EFAULT: 0;
 }
 
-
-static int scsi_ioctl_common(struct scsi_device *sdev, int cmd, void __user *arg)
+/**
+ * scsi_ioctl - Dispatch ioctl to scsi device
+ * @sdev: scsi device receiving ioctl
+ * @cmd: which ioctl is it
+ * @arg: data associated with ioctl
+ *
+ * Description: The scsi_ioctl() function differs from most ioctls in that it
+ * does not take a major/minor number as the dev field.  Rather, it takes
+ * a pointer to a &struct scsi_device.
+ */
+int scsi_ioctl(struct scsi_device *sdev, int cmd, void __user *arg)
 {
 	char scsi_cmd[MAX_COMMAND_SIZE];
 	struct scsi_sense_hdr sense_hdr;
@@ -258,48 +267,19 @@ static int scsi_ioctl_common(struct scsi_device *sdev, int cmd, void __user *arg
 	case SG_SCSI_RESET:
 		return scsi_ioctl_reset(sdev, arg);
 	}
-	return -ENOIOCTLCMD;
-}
-
-/**
- * scsi_ioctl - Dispatch ioctl to scsi device
- * @sdev: scsi device receiving ioctl
- * @cmd: which ioctl is it
- * @arg: data associated with ioctl
- *
- * Description: The scsi_ioctl() function differs from most ioctls in that it
- * does not take a major/minor number as the dev field.  Rather, it takes
- * a pointer to a &struct scsi_device.
- */
-int scsi_ioctl(struct scsi_device *sdev, int cmd, void __user *arg)
-{
-	int ret = scsi_ioctl_common(sdev, cmd, arg);
-
-	if (ret != -ENOIOCTLCMD)
-		return ret;
-
-	if (sdev->host->hostt->ioctl)
-		return sdev->host->hostt->ioctl(sdev, cmd, arg);
-
-	return -EINVAL;
-}
-EXPORT_SYMBOL(scsi_ioctl);
 
 #ifdef CONFIG_COMPAT
-int scsi_compat_ioctl(struct scsi_device *sdev, int cmd, void __user *arg)
-{
-	int ret = scsi_ioctl_common(sdev, cmd, arg);
-
-	if (ret != -ENOIOCTLCMD)
-		return ret;
-
-	if (sdev->host->hostt->compat_ioctl)
+	if (in_compat_syscall()) {
+		if (!sdev->host->hostt->compat_ioctl)
+			return -EINVAL;
 		return sdev->host->hostt->compat_ioctl(sdev, cmd, arg);
-
-	return ret;
-}
-EXPORT_SYMBOL(scsi_compat_ioctl);
+	}
 #endif
+	if (!sdev->host->hostt->ioctl)
+		return -EINVAL;
+	return sdev->host->hostt->ioctl(sdev, cmd, arg);
+}
+EXPORT_SYMBOL(scsi_ioctl);
 
 /*
  * We can process a reset even when a device isn't fully operable.
diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
index f470daf76155..1c9dbdaaef22 100644
--- a/drivers/scsi/sd.c
+++ b/drivers/scsi/sd.c
@@ -1591,8 +1591,6 @@ static int sd_ioctl(struct block_device *bdev, fmode_t mode,
 			return error;
 	}
 
-	if (in_compat_syscall())
-		return scsi_compat_ioctl(sdp, cmd, p);
 	return scsi_ioctl(sdp, cmd, p);
 }
 
diff --git a/drivers/scsi/sg.c b/drivers/scsi/sg.c
index 0a6655bad5a4..c3562c2d0dca 100644
--- a/drivers/scsi/sg.c
+++ b/drivers/scsi/sg.c
@@ -1165,9 +1165,6 @@ sg_ioctl(struct file *filp, unsigned int cmd_in, unsigned long arg)
 	ret = sg_ioctl_common(filp, sdp, sfp, cmd_in, p);
 	if (ret != -ENOIOCTLCMD)
 		return ret;
-
-	if (in_compat_syscall())
-		return scsi_compat_ioctl(sdp->device, cmd_in, p);
 	return scsi_ioctl(sdp->device, cmd_in, p);
 }
 
diff --git a/drivers/scsi/sr.c b/drivers/scsi/sr.c
index b34f06924659..c5e163a659d2 100644
--- a/drivers/scsi/sr.c
+++ b/drivers/scsi/sr.c
@@ -584,10 +584,7 @@ static int sr_block_ioctl(struct block_device *bdev, fmode_t mode, unsigned cmd,
 			goto put;
 	}
 
-	if (in_compat_syscall())
-		ret = scsi_compat_ioctl(sdev, cmd, argp);
-	else
-		ret = scsi_ioctl(sdev, cmd, argp);
+	ret = scsi_ioctl(sdev, cmd, argp);
 
 put:
 	scsi_autopm_put_device(sdev);
diff --git a/drivers/scsi/st.c b/drivers/scsi/st.c
index c6f14540ae03..c3fee73e018e 100644
--- a/drivers/scsi/st.c
+++ b/drivers/scsi/st.c
@@ -3886,7 +3886,7 @@ static long st_compat_ioctl(struct file *file, unsigned int cmd_in, unsigned lon
 	if (ret != -ENOTTY)
 		return ret;
 
-	return scsi_compat_ioctl(STp->device, cmd_in, p);
+	return scsi_ioctl(STp->device, cmd_in, p);
 }
 #endif
 
diff --git a/include/scsi/scsi_ioctl.h b/include/scsi/scsi_ioctl.h
index b465799f4d2d..cdb3ba3451e7 100644
--- a/include/scsi/scsi_ioctl.h
+++ b/include/scsi/scsi_ioctl.h
@@ -44,7 +44,6 @@ typedef struct scsi_fctargaddress {
 int scsi_ioctl_block_when_processing_errors(struct scsi_device *sdev,
 		int cmd, bool ndelay);
 extern int scsi_ioctl(struct scsi_device *, int, void __user *);
-extern int scsi_compat_ioctl(struct scsi_device *sdev, int cmd, void __user *arg);
 
 #endif /* __KERNEL__ */
 #endif /* _SCSI_IOCTL_H */
-- 
2.30.2

