[PATCH] i2o: remove compile-time warnings

From: Hannes Reinecke
Date: Wed Feb 20 2013 - 08:24:58 EST


The compiler complains about invalid cast for i2o_config.
However, the ioctl passes us an 32-bit address, which we
have to assume is a valid 64-bit kernel address.
So we should cast this to 'unsigned long' before casting
it to a pointer.
Minimal fix, doesn't break anything which wasn't broken
before.

Cc: Jiri Kosina <jkosina@xxxxxxx>
Signed-off-by: Hannes Reinecke <hare@xxxxxxx>

diff --git a/drivers/message/i2o/i2o_config.c b/drivers/message/i2o/i2o_config.c
index 5451bef..5b95dc1 100644
--- a/drivers/message/i2o/i2o_config.c
+++ b/drivers/message/i2o/i2o_config.c
@@ -883,10 +883,9 @@ static int i2o_cfg_passthru(unsigned long arg)
/* Copy in the user's SG buffer if necessary */
if (sg[i].
flag_count & 0x04000000 /*I2O_SGL_FLAGS_DIR */ ) {
- // TODO 64bit fix
- if (copy_from_user
- (p->virt, (void __user *)sg[i].addr_bus,
- sg_size)) {
+ void __user *sg_addr = (void __user *)
+ (unsigned long)sg[i].addr_bus;
+ if (copy_from_user(p->virt, sg_addr, sg_size)) {
printk(KERN_DEBUG
"%s: Could not copy SG buf %d FROM user\n",
c->name, i);
@@ -937,11 +936,12 @@ static int i2o_cfg_passthru(unsigned long arg)
if (!
(sg[j].
flag_count & 0x4000000 /*I2O_SGL_FLAGS_DIR */ )) {
+ void __user *sg_addr = (void __user *)
+ (unsigned long)sg[j].addr_bus;
+
sg_size = sg[j].flag_count & 0xffffff;
- // TODO 64bit fix
- if (copy_to_user
- ((void __user *)sg[j].addr_bus, sg_list[j].virt,
- sg_size)) {
+ if (copy_to_user(sg_addr, sg_list[j].virt,
+ sg_size)) {
printk(KERN_WARNING
"%s: Could not copy %p TO user %x\n",
c->name, sg_list[j].virt,
--
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