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authorDavid Jeffery <djeffery@redhat.com>2014-09-29 18:21:10 +0400
committerAl Viro <viro@zeniv.linux.org.uk>2014-10-31 13:33:26 +0300
commitb2de525f095708b2adbadaec3f1e4017a23d1e09 (patch)
tree4a46a47864031b2a019d6fa605d835a3ca88c539 /include/linux
parentb0afd8e5db7b11aa9078e82e7f9abc30dc35a3c1 (diff)
downloadlinux-b2de525f095708b2adbadaec3f1e4017a23d1e09.tar.xz
Return short read or 0 at end of a raw device, not EIO
Author: David Jeffery <djeffery@redhat.com> Changes to the basic direct I/O code have broken the raw driver when reading to the end of a raw device. Instead of returning a short read for a read that extends partially beyond the device's end or 0 when at the end of the device, these reads now return EIO. The raw driver needs the same end of device handling as was added for normal block devices. Using blkdev_read_iter, which has the needed size checks, prevents the EIO conditions at the end of the device. Signed-off-by: David Jeffery <djeffery@redhat.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'include/linux')
-rw-r--r--include/linux/fs.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 01036262095f..9ab779e8a63c 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -2469,6 +2469,7 @@ extern ssize_t new_sync_read(struct file *filp, char __user *buf, size_t len, lo
extern ssize_t new_sync_write(struct file *filp, const char __user *buf, size_t len, loff_t *ppos);
/* fs/block_dev.c */
+extern ssize_t blkdev_read_iter(struct kiocb *iocb, struct iov_iter *to);
extern ssize_t blkdev_write_iter(struct kiocb *iocb, struct iov_iter *from);
extern int blkdev_fsync(struct file *filp, loff_t start, loff_t end,
int datasync);