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authorLinus Torvalds <torvalds@linux-foundation.org>2013-05-23 09:26:32 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2013-05-23 09:26:32 -0700
commit5cc0c03823ca18c490f8223f85ed40f2a9d936c4 (patch)
treea05b7a2a1153efff01a78dc54e2102420e2c29bb /drivers/char
parentb64194068bbbdef3cc235f5459616a330f3b7724 (diff)
parentb5325a02aa84c794cf520d6d68cae4b150988a32 (diff)
downloadvexpress-lsk-5cc0c03823ca18c490f8223f85ed40f2a9d936c4.tar.gz
Merge tag 'char-misc-3.10-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc
Pull char/misc driver fixes from Greg Kroah-Hartman: "Here are some small char/misc driver fixes for 3.10-rc2. Nothing major here, just a number of fixes for things that people have reported, and a MAINTAINERS update for the recent changes for the hyperv files that went into 3.10-rc1." * tag 'char-misc-3.10-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: ttyprintk: Fix NULL pointer deref by setting tty_port ops after initializing port uio: UIO_DMEM_GENIRQ should depend on HAS_DMA MAINTAINERS: update Hyper-V file list mei: bus: Reset event_cb when disabling a device Drivers: hv: Fix a bug in get_vp_index() mei: fix out of array access to me clients array Char: lp, protect LPGETSTATUS with port_mutex dummy-irq: require the user to specify an IRQ number
Diffstat (limited to 'drivers/char')
-rw-r--r--drivers/char/lp.c3
-rw-r--r--drivers/char/ttyprintk.c2
2 files changed, 4 insertions, 1 deletions
diff --git a/drivers/char/lp.c b/drivers/char/lp.c
index dafd9ac6428..0913d79424d 100644
--- a/drivers/char/lp.c
+++ b/drivers/char/lp.c
@@ -622,9 +622,12 @@ static int lp_do_ioctl(unsigned int minor, unsigned int cmd,
return -EFAULT;
break;
case LPGETSTATUS:
+ if (mutex_lock_interruptible(&lp_table[minor].port_mutex))
+ return -EINTR;
lp_claim_parport_or_block (&lp_table[minor]);
status = r_str(minor);
lp_release_parport (&lp_table[minor]);
+ mutex_unlock(&lp_table[minor].port_mutex);
if (copy_to_user(argp, &status, sizeof(int)))
return -EFAULT;
diff --git a/drivers/char/ttyprintk.c b/drivers/char/ttyprintk.c
index 4945bd3d18d..d5d2e4a985a 100644
--- a/drivers/char/ttyprintk.c
+++ b/drivers/char/ttyprintk.c
@@ -179,7 +179,6 @@ static int __init ttyprintk_init(void)
{
int ret = -ENOMEM;
- tpk_port.port.ops = &null_ops;
mutex_init(&tpk_port.port_write_mutex);
ttyprintk_driver = tty_alloc_driver(1,
@@ -190,6 +189,7 @@ static int __init ttyprintk_init(void)
return PTR_ERR(ttyprintk_driver);
tty_port_init(&tpk_port.port);
+ tpk_port.port.ops = &null_ops;
ttyprintk_driver->driver_name = "ttyprintk";
ttyprintk_driver->name = "ttyprintk";