Scenario: Process A keeps the character device file of node N open.
N is being unplugged. File /dev/fwN won't be destroyed as long as A
doesn't close it. Now, process B opens /dev/fwN as well. Previously
it would succeed but be unable to do any IO on it of course. With this
patch, process B's open() will fail immediately with -ENODEV.
Signed-off-by: Stefan Richter <[EMAIL PROTECTED]>
---
drivers/firewire/fw-device.c | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)
Index: linux/drivers/firewire/fw-device.c
===================================================================
--- linux.orig/drivers/firewire/fw-device.c
+++ linux/drivers/firewire/fw-device.c
@@ -616,8 +616,12 @@ struct fw_device *fw_device_from_devt(de
down_read(&idr_rwsem);
device = idr_find(&fw_device_idr, MINOR(devt));
- if (device)
- fw_device_get(device);
+ if (device) {
+ if (fw_device_is_shutdown(device))
+ device = NULL;
+ else
+ fw_device_get(device);
+ }
up_read(&idr_rwsem);
return device;
--
Stefan Richter
-=====-==--- ---= ==-==
http://arcgraph.de/sr/
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [EMAIL PROTECTED]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
