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authorAlexander Gordeev <lasaine@lvk.cs.msu.su>2011-01-25 15:07:19 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2011-01-26 10:50:00 +1000
commit4f542e3dd90a96ee0f8fcb8173cb4104f5f753e6 (patch)
tree1127d2abe1aa2a98ccf6d8a336f8dd68a285340e /drivers/pps
parenta783ac4453405b579ab7732ba3c0efc07a4b7a61 (diff)
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pps: claim parallel port exclusively
Both pps_parport and pps_gen_parport are written in a way that they can't share a port with any other driver. This can result in locking up the process that loads modules or even the whole kernel if the modules are compiled in. Use PARPORT_FLAG_EXCL to indicate this. Signed-off-by: Alexander Gordeev <lasaine@lvk.cs.msu.su> Cc: Alexander Gordeev <lasaine@lvk.cs.msu.su> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/pps')
-rw-r--r--drivers/pps/clients/pps_parport.c2
-rw-r--r--drivers/pps/generators/pps_gen_parport.c2
2 files changed, 2 insertions, 2 deletions
diff --git a/drivers/pps/clients/pps_parport.c b/drivers/pps/clients/pps_parport.c
index 32221efd9ca9..c571d6dd8f61 100644
--- a/drivers/pps/clients/pps_parport.c
+++ b/drivers/pps/clients/pps_parport.c
@@ -163,7 +163,7 @@ static void parport_attach(struct parport *port)
}
device->pardev = parport_register_device(port, KBUILD_MODNAME,
- NULL, NULL, parport_irq, 0, device);
+ NULL, NULL, parport_irq, PARPORT_FLAG_EXCL, device);
if (!device->pardev) {
pr_err("couldn't register with %s\n", port->name);
goto err_free;
diff --git a/drivers/pps/generators/pps_gen_parport.c b/drivers/pps/generators/pps_gen_parport.c
index 5c32f8dacf56..b93af3ebb5ba 100644
--- a/drivers/pps/generators/pps_gen_parport.c
+++ b/drivers/pps/generators/pps_gen_parport.c
@@ -198,7 +198,7 @@ static void parport_attach(struct parport *port)
}
device.pardev = parport_register_device(port, KBUILD_MODNAME,
- NULL, NULL, NULL, 0, &device);
+ NULL, NULL, NULL, PARPORT_FLAG_EXCL, &device);
if (!device.pardev) {
pr_err("couldn't register with %s\n", port->name);
return;