[openib-general] [PATCH 9 of 28] IB/ipath - only allow complete writes to flash

[Bryan O'Sullivan]

Don't allow a write to the eeprom from ipathfs unless the write is exactly
128 bytes and starts at offset 0.

Signed-off-by: Bryan O'Sullivan <bryan.osullivan at qlogic.com>

diff -r cc3350eeb557 -r 934e5c1d6ade drivers/infiniband/hw/ipath/ipath_fs.c
--- a/drivers/infiniband/hw/ipath/ipath_fs.c	Thu Sep 28 08:57:12 2006 -0700
+++ b/drivers/infiniband/hw/ipath/ipath_fs.c	Thu Sep 28 08:57:12 2006 -0700
@@ -357,18 +357,15 @@ static ssize_t flash_write(struct file *
 
 	pos = *ppos;
 
-	if ( pos < 0) {
+	if (pos != 0) {
 		ret = -EINVAL;
 		goto bail;
 	}
 
-	if (pos >= sizeof(struct ipath_flash)) {
-		ret = 0;
-		goto bail;
-	}
-
-	if (count > sizeof(struct ipath_flash) - pos)
-		count = sizeof(struct ipath_flash) - pos;
+	if (count != sizeof(struct ipath_flash)) {
+		ret = -EINVAL;
+		goto bail;
+	}
 
 	tmp = kmalloc(count, GFP_KERNEL);
 	if (!tmp) {