diff options
author | David Woodhouse <David.Woodhouse@intel.com> | 2009-12-08 09:58:33 +0000 |
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committer | David Woodhouse <David.Woodhouse@intel.com> | 2009-12-08 09:59:24 +0000 |
commit | ec208491936d6adb8a70c3dd4a517cdfe54e823d (patch) | |
tree | c7291450e8e559c5fbf3360df30999432204af3c /drivers/input/serio/libps2.c | |
parent | aa697079ee66315c4b9747a5eb3e48487fb1b8be (diff) | |
parent | 7b626acb8f983eb83b396ab96cc24b18d635d487 (diff) |
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
Merge the BIOS workarounds from 2.6.32, and the swiotlb fallback on failure.
Diffstat (limited to 'drivers/input/serio/libps2.c')
-rw-r--r-- | drivers/input/serio/libps2.c | 29 |
1 files changed, 25 insertions, 4 deletions
diff --git a/drivers/input/serio/libps2.c b/drivers/input/serio/libps2.c index 3a95b508bf27..f3876acc3e83 100644 --- a/drivers/input/serio/libps2.c +++ b/drivers/input/serio/libps2.c @@ -13,10 +13,12 @@ #include <linux/delay.h> #include <linux/module.h> +#include <linux/sched.h> #include <linux/slab.h> #include <linux/interrupt.h> #include <linux/input.h> #include <linux/serio.h> +#include <linux/i8042.h> #include <linux/init.h> #include <linux/libps2.h> @@ -54,6 +56,24 @@ int ps2_sendbyte(struct ps2dev *ps2dev, unsigned char byte, int timeout) } EXPORT_SYMBOL(ps2_sendbyte); +void ps2_begin_command(struct ps2dev *ps2dev) +{ + mutex_lock(&ps2dev->cmd_mutex); + + if (i8042_check_port_owner(ps2dev->serio)) + i8042_lock_chip(); +} +EXPORT_SYMBOL(ps2_begin_command); + +void ps2_end_command(struct ps2dev *ps2dev) +{ + if (i8042_check_port_owner(ps2dev->serio)) + i8042_unlock_chip(); + + mutex_unlock(&ps2dev->cmd_mutex); +} +EXPORT_SYMBOL(ps2_end_command); + /* * ps2_drain() waits for device to transmit requested number of bytes * and discards them. @@ -66,7 +86,7 @@ void ps2_drain(struct ps2dev *ps2dev, int maxbytes, int timeout) maxbytes = sizeof(ps2dev->cmdbuf); } - mutex_lock(&ps2dev->cmd_mutex); + ps2_begin_command(ps2dev); serio_pause_rx(ps2dev->serio); ps2dev->flags = PS2_FLAG_CMD; @@ -76,7 +96,8 @@ void ps2_drain(struct ps2dev *ps2dev, int maxbytes, int timeout) wait_event_timeout(ps2dev->wait, !(ps2dev->flags & PS2_FLAG_CMD), msecs_to_jiffies(timeout)); - mutex_unlock(&ps2dev->cmd_mutex); + + ps2_end_command(ps2dev); } EXPORT_SYMBOL(ps2_drain); @@ -237,9 +258,9 @@ int ps2_command(struct ps2dev *ps2dev, unsigned char *param, int command) { int rc; - mutex_lock(&ps2dev->cmd_mutex); + ps2_begin_command(ps2dev); rc = __ps2_command(ps2dev, param, command); - mutex_unlock(&ps2dev->cmd_mutex); + ps2_end_command(ps2dev); return rc; } |