diff options
| author | Tejun Heo <tj@kernel.org> | 2010-11-13 11:55:17 +0100 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2010-11-13 11:55:17 +0100 |
| commit | 75f1dc0d076d1c1168f2115f1941ea627d38bd5a (patch) | |
| tree | af12858b842579e8924b30cb636b96fcca6f46b1 /drivers/usb/gadget/storage_common.c | |
| parent | 6a027eff62f6ae32d49f2ae5dadd6f4eee1ddae2 (diff) | |
| download | lwn-75f1dc0d076d1c1168f2115f1941ea627d38bd5a.tar.gz lwn-75f1dc0d076d1c1168f2115f1941ea627d38bd5a.zip | |
block: check bdev_read_only() from blkdev_get()
bdev read-only status can be queried using bdev_read_only() and may
change while the device is being opened. Enforce it by checking it
from blkdev_get() after open succeeds.
This makes bdev_read_only() check in open_bdev_exclusive() and
fsg_lun_open() unnecessary. Drop them.
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: David Brownell <dbrownell@users.sourceforge.net>
Cc: linux-usb@vger.kernel.org
Diffstat (limited to 'drivers/usb/gadget/storage_common.c')
| -rw-r--r-- | drivers/usb/gadget/storage_common.c | 7 |
1 files changed, 2 insertions, 5 deletions
diff --git a/drivers/usb/gadget/storage_common.c b/drivers/usb/gadget/storage_common.c index 3b513bafaf2a..b015561fd602 100644 --- a/drivers/usb/gadget/storage_common.c +++ b/drivers/usb/gadget/storage_common.c @@ -543,7 +543,7 @@ static int fsg_lun_open(struct fsg_lun *curlun, const char *filename) ro = curlun->initially_ro; if (!ro) { filp = filp_open(filename, O_RDWR | O_LARGEFILE, 0); - if (-EROFS == PTR_ERR(filp)) + if (PTR_ERR(filp) == -EROFS || PTR_ERR(filp) == -EACCES) ro = 1; } if (ro) @@ -558,10 +558,7 @@ static int fsg_lun_open(struct fsg_lun *curlun, const char *filename) if (filp->f_path.dentry) inode = filp->f_path.dentry->d_inode; - if (inode && S_ISBLK(inode->i_mode)) { - if (bdev_read_only(inode->i_bdev)) - ro = 1; - } else if (!inode || !S_ISREG(inode->i_mode)) { + if (!inode || (!S_ISREG(inode->i_mode) && !S_ISBLK(inode->i_mode))) { LINFO(curlun, "invalid file type: %s\n", filename); goto out; } |