[PATCH] arch:powerpc simple_write_to_buffer return check

[Mayank Suman]

Signed-off-by: Mayank Suman <mayanksu...@live.com>
---
 arch/powerpc/kernel/eeh.c                    | 8 ++++----
 arch/powerpc/platforms/powernv/eeh-powernv.c | 4 ++--
 2 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/arch/powerpc/kernel/eeh.c b/arch/powerpc/kernel/eeh.c
index 813713c9120c..2dbe1558a71f 100644
--- a/arch/powerpc/kernel/eeh.c
+++ b/arch/powerpc/kernel/eeh.c
@@ -1628,8 +1628,8 @@ static ssize_t eeh_force_recover_write(struct file *filp,
        char buf[20];
        int ret;
 
-       ret = simple_write_to_buffer(buf, sizeof(buf), ppos, user_buf, count);
-       if (!ret)
+       ret = simple_write_to_buffer(buf, sizeof(buf)-1, ppos, user_buf, count);
+       if (ret <= 0)
                return -EFAULT;
 
        /*
@@ -1696,7 +1696,7 @@ static ssize_t eeh_dev_check_write(struct file *filp,
 
        memset(buf, 0, sizeof(buf));
        ret = simple_write_to_buffer(buf, sizeof(buf)-1, ppos, user_buf, count);
-       if (!ret)
+       if (ret <= 0)
                return -EFAULT;
 
        ret = sscanf(buf, "%x:%x:%x.%x", &domain, &bus, &dev, &fn);
@@ -1836,7 +1836,7 @@ static ssize_t eeh_dev_break_write(struct file *filp,
 
        memset(buf, 0, sizeof(buf));
        ret = simple_write_to_buffer(buf, sizeof(buf)-1, ppos, user_buf, count);
-       if (!ret)
+       if (ret <= 0)
                return -EFAULT;
 
        ret = sscanf(buf, "%x:%x:%x.%x", &domain, &bus, &dev, &fn);
diff --git a/arch/powerpc/platforms/powernv/eeh-powernv.c 
b/arch/powerpc/platforms/powernv/eeh-powernv.c
index 89e22c460ebf..36ed2b8f7375 100644
--- a/arch/powerpc/platforms/powernv/eeh-powernv.c
+++ b/arch/powerpc/platforms/powernv/eeh-powernv.c
@@ -76,8 +76,8 @@ static ssize_t pnv_eeh_ei_write(struct file *filp,
                return -ENXIO;
 
        /* Copy over argument buffer */
-       ret = simple_write_to_buffer(buf, sizeof(buf), ppos, user_buf, count);
-       if (!ret)
+       ret = simple_write_to_buffer(buf, sizeof(buf)-1, ppos, user_buf, count);
+       if (ret <= 0)
                return -EFAULT;
 
        /* Retrieve parameters */
-- 
2.30.0