From ac07a4a57f7408922a0b3d4dcb87104fe8a3d8ca Mon Sep 17 00:00:00 2001
From: Brian King <brking@linux.vnet.ibm.com>
Date: Tue, 13 Sep 2011 11:22:51 +0000
Subject: [PATCH] hvcs: Ensure page aligned partner info buffer
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@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
drivers/tty/hvc/hvcs.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/tty/hvc/hvcs.c b/drivers/tty/hvc/hvcs.c
index 4c8b66546930bc..39291665eca357 100644
--- a/drivers/tty/hvc/hvcs.c
+++ b/drivers/tty/hvc/hvcs.c
@@ -1532,7 +1532,7 @@ static int __devinit hvcs_initialize(void)
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(void)
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);
--
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