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| author | Pete Zaitcev <zaitcev@redhat.com> | 2009-01-06 17:20:42 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2009-03-24 16:20:26 -0700 |
| commit | dd44be6b17ac52238aa6c7f46b906d9fb76e7052 (patch) | |
| tree | 7e7d94aeced10435c3e6abb91b7563a126e866a5 /drivers/usb/class | |
| parent | 5c16034d73da2c1b663aa25dedadbc533b3d811c (diff) | |
| download | linux-dd44be6b17ac52238aa6c7f46b906d9fb76e7052.tar.gz linux-dd44be6b17ac52238aa6c7f46b906d9fb76e7052.tar.bz2 linux-dd44be6b17ac52238aa6c7f46b906d9fb76e7052.zip | |
usblp: continuously poll for status
The usblp in 2.6.18 polled for status regardless if we actually needed it.
At some point I dropped it, to save the batteries if nothing else.
As it turned out, printers exist (e.g. Canon BJC-3000) that need prodding
this way or else they stop. This patch restores the old behaviour.
If you want to save battery, don't leave jobs in the print queue.
I tested this on my printers by printing and examining usbmon traces
to make sure status is being requested and printers continue to print.
Tuomas Jäntti verified the fix on BJC-3000.
Signed-off-by: Pete Zaitcev <zaitcev@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb/class')
| -rw-r--r-- | drivers/usb/class/usblp.c | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/drivers/usb/class/usblp.c b/drivers/usb/class/usblp.c index 3f3ee1351930..d2747a49b974 100644 --- a/drivers/usb/class/usblp.c +++ b/drivers/usb/class/usblp.c @@ -880,16 +880,19 @@ static int usblp_wwait(struct usblp *usblp, int nonblock) if (rc <= 0) break; - if (usblp->flags & LP_ABORT) { - if (schedule_timeout(msecs_to_jiffies(5000)) == 0) { + if (schedule_timeout(msecs_to_jiffies(1500)) == 0) { + if (usblp->flags & LP_ABORT) { err = usblp_check_status(usblp, err); if (err == 1) { /* Paper out */ rc = -ENOSPC; break; } + } else { + /* Prod the printer, Gentoo#251237. */ + mutex_lock(&usblp->mut); + usblp_read_status(usblp, usblp->statusbuf); + mutex_unlock(&usblp->mut); } - } else { - schedule(); } } set_current_state(TASK_RUNNING); |