diff options
| author | Jonathan Corbet <corbet@lwn.net> | 2008-05-15 12:22:06 -0600 |
|---|---|---|
| committer | Jonathan Corbet <corbet@lwn.net> | 2008-06-20 14:05:49 -0600 |
| commit | eb09d3d4ee09b25876db549b6d5221610216e105 (patch) | |
| tree | 6ae407c664fee1be448f03db2d75bafb9941e13a | |
| parent | 04f4ac9d1bb8a9103609ce8e927f8e98826ce339 (diff) | |
| download | linux-eb09d3d4ee09b25876db549b6d5221610216e105.tar.bz2 | |
sg: cdev lock_kernel() pushdown
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
| -rw-r--r-- | drivers/scsi/sg.c | 16 |
1 files changed, 13 insertions, 3 deletions
diff --git a/drivers/scsi/sg.c b/drivers/scsi/sg.c index c9d7f721b9e2..4284625ed035 100644 --- a/drivers/scsi/sg.c +++ b/drivers/scsi/sg.c @@ -49,6 +49,7 @@ static int sg_version_num = 30534; /* 2 digits for each component */ #include <linux/delay.h> #include <linux/scatterlist.h> #include <linux/blktrace_api.h> +#include <linux/smp_lock.h> #include "scsi.h" #include <scsi/scsi_dbg.h> @@ -227,19 +228,26 @@ sg_open(struct inode *inode, struct file *filp) int res; int retval; + lock_kernel(); nonseekable_open(inode, filp); SCSI_LOG_TIMEOUT(3, printk("sg_open: dev=%d, flags=0x%x\n", dev, flags)); sdp = sg_get_dev(dev); - if ((!sdp) || (!sdp->device)) + if ((!sdp) || (!sdp->device)) { + unlock_kernel(); return -ENXIO; - if (sdp->detached) + } + if (sdp->detached) { + unlock_kernel(); return -ENODEV; + } /* This driver's module count bumped by fops_get in <linux/fs.h> */ /* Prevent the device driver from vanishing while we sleep */ retval = scsi_device_get(sdp->device); - if (retval) + if (retval) { + unlock_kernel(); return retval; + } if (!((flags & O_NONBLOCK) || scsi_block_when_processing_errors(sdp->device))) { @@ -295,10 +303,12 @@ sg_open(struct inode *inode, struct file *filp) retval = -ENOMEM; goto error_out; } + unlock_kernel(); return 0; error_out: scsi_device_put(sdp->device); + unlock_kernel(); return retval; } |