[PATCH 1/1] hvcs: Ensure page aligned partner info buffer

[Brian King]

The Power platform requires the partner info buffer to be page aligned
otherwise it will fail the partner info hcall with H_PARAMETER. Switch
from using kmalloc to allocate this buffer to __get_free_page to ensure
page alignment.

Signed-off-by: Brian King <brking at linux.vnet.ibm.com>
---

 drivers/tty/hvc/hvcs.c |    6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff -puN drivers/tty/hvc/hvcs.c~hvcs_pi_buf_alloc drivers/tty/hvc/hvcs.c
--- linux-2.6/drivers/tty/hvc/hvcs.c~hvcs_pi_buf_alloc	2011-09-09 16:00:25.000000000 -0500
+++ linux-2.6-bjking1/drivers/tty/hvc/hvcs.c	2011-09-09 16:07:08.000000000 -0500
@@ -1532,7 +1532,7 @@ static int __devinit hvcs_initialize(voi
 		goto register_fail;
 	}
 
-	hvcs_pi_buff = kmalloc(PAGE_SIZE, GFP_KERNEL);
+	hvcs_pi_buff = (unsigned long *) __get_free_page(GFP_KERNEL);
 	if (!hvcs_pi_buff) {
 		rc = -ENOMEM;
 		goto buff_alloc_fail;
@@ -1548,7 +1548,7 @@ static int __devinit hvcs_initialize(voi
 	return 0;
 
 kthread_fail:
-	kfree(hvcs_pi_buff);
+	free_page((unsigned long)hvcs_pi_buff);
 buff_alloc_fail:
 	tty_unregister_driver(hvcs_tty_driver);
 register_fail:
@@ -1597,7 +1597,7 @@ static void __exit hvcs_module_exit(void
 	kthread_stop(hvcs_task);
 
 	spin_lock(&hvcs_pi_lock);
-	kfree(hvcs_pi_buff);
+	free_page((unsigned long)hvcs_pi_buff);
 	hvcs_pi_buff = NULL;
 	spin_unlock(&hvcs_pi_lock);
 
_