From: Christoph Hellwig <hch@lst.de>
Date: Wed, 5 Nov 2008 13:58:42 +0000 (+0100)
Subject: [PATCH 1/2] kill FMODE_NDELAY_NOW
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=fd4ce1acd0f8558033b1a6968001552bd7671e6d;p=GitHub%2FLineageOS%2Fandroid_kernel_samsung_universal7580.git

[PATCH 1/2] kill FMODE_NDELAY_NOW

Update FMODE_NDELAY before each ioctl call so that we can kill the
magic FMODE_NDELAY_NOW.  It would be even better to do this directly
in setfl(), but for that we'd need to have FMODE_NDELAY for all files,
not just block special files.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---

diff --git a/block/compat_ioctl.c b/block/compat_ioctl.c
index d43e6087bad..67eb93cff69 100644
--- a/block/compat_ioctl.c
+++ b/block/compat_ioctl.c
@@ -722,8 +722,14 @@ long compat_blkdev_ioctl(struct file *file, unsigned cmd, unsigned long arg)
 	struct backing_dev_info *bdi;
 	loff_t size;
 
+	/*
+	 * O_NDELAY can be altered using fcntl(.., F_SETFL, ..), so we have
+	 * to updated it before every ioctl.
+	 */
 	if (file->f_flags & O_NDELAY)
-		mode |= FMODE_NDELAY_NOW;
+		mode |= FMODE_NDELAY;
+	else
+		mode &= ~FMODE_NDELAY;
 
 	switch (cmd) {
 	case HDIO_GETGEO:
diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
index c9e1242eaf2..5081b3981d3 100644
--- a/drivers/scsi/sd.c
+++ b/drivers/scsi/sd.c
@@ -757,7 +757,7 @@ static int sd_ioctl(struct block_device *bdev, fmode_t mode,
 	 * access to the device is prohibited.
 	 */
 	error = scsi_nonblockable_ioctl(sdp, cmd, p,
-					(mode & FMODE_NDELAY_NOW) != 0);
+					(mode & FMODE_NDELAY) != 0);
 	if (!scsi_block_when_processing_errors(sdp) || !error)
 		return error;
 
diff --git a/drivers/scsi/sr.c b/drivers/scsi/sr.c
index 62b6633e3a9..45b66b98a51 100644
--- a/drivers/scsi/sr.c
+++ b/drivers/scsi/sr.c
@@ -521,7 +521,7 @@ static int sr_block_ioctl(struct block_device *bdev, fmode_t mode, unsigned cmd,
 	 * if it doesn't recognise the ioctl
 	 */
 	ret = scsi_nonblockable_ioctl(sdev, cmd, argp,
-					(mode & FMODE_NDELAY_NOW) != 0);
+					(mode & FMODE_NDELAY) != 0);
 	if (ret != -ENODEV)
 		return ret;
 	return scsi_ioctl(sdev, cmd, argp);
diff --git a/fs/block_dev.c b/fs/block_dev.c
index 7c727523bc5..99e0ae1a4c7 100644
--- a/fs/block_dev.c
+++ b/fs/block_dev.c
@@ -1206,8 +1206,16 @@ static long block_ioctl(struct file *file, unsigned cmd, unsigned long arg)
 {
 	struct block_device *bdev = I_BDEV(file->f_mapping->host);
 	fmode_t mode = file->f_mode;
+
+	/*
+	 * O_NDELAY can be altered using fcntl(.., F_SETFL, ..), so we have
+	 * to updated it before every ioctl.
+	 */
 	if (file->f_flags & O_NDELAY)
-		mode |= FMODE_NDELAY_NOW;
+		mode |= FMODE_NDELAY;
+	else
+		mode &= ~FMODE_NDELAY;
+
 	return blkdev_ioctl(bdev, mode, cmd, arg);
 }
 
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 0dcdd9458f4..b3345a90e11 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -79,7 +79,6 @@ extern int dir_notify_enable;
 #define FMODE_NDELAY	((__force fmode_t)32)
 #define FMODE_EXCL	((__force fmode_t)64)
 #define FMODE_WRITE_IOCTL	((__force fmode_t)128)
-#define FMODE_NDELAY_NOW	((__force fmode_t)256)
 
 #define RW_MASK		1
 #define RWA_MASK	2