On 15/07/2020 05:48, B K Karthik wrote:
fixed a sparse warning by changing the type in
assignment from void [noderef] __user * to unsigned int *
(different address space)
Signed-off-by: B K Karthik <karthik.bk2...@live.com>
---
drivers/staging/comedi/comedi_fops.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/staging/comedi/comedi_fops.c
b/drivers/staging/comedi/comedi_fops.c
index 3f70e5dfac39..4cc012e231b7 100644
--- a/drivers/staging/comedi/comedi_fops.c
+++ b/drivers/staging/comedi/comedi_fops.c
@@ -2956,7 +2956,7 @@ static int get_compat_cmd(struct comedi_cmd *cmd,
cmd->scan_end_arg = v32.scan_end_arg;
cmd->stop_src = v32.stop_src;
cmd->stop_arg = v32.stop_arg;
- cmd->chanlist = compat_ptr(v32.chanlist);
+ cmd->chanlist = (unsigned int *) compat_ptr(v32.chanlist);
That should be:
cmd->chanlist = (unsigned int __force *)compat_ptr(v32.chanlist);
cmd->chanlist_len = v32.chanlist_len;
cmd->data = compat_ptr(v32.data);
cmd->data_len = v32.data_len;
A reverse cast is required in put_compat_cmd():
v32.chanlist = ptr_to_compat((unsigned int __user *)cmd->chanlist);
Those changes will get rid of the sparse warnings.
--
-=( Ian Abbott <abbo...@mev.co.uk> || Web: www.mev.co.uk )=-
-=( MEV Ltd. is a company registered in England & Wales. )=-
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