usb: typec: ucsi: fix Clang -Wsign-conversion warning

commit f4239ace2dd8606f6824757f192965a95746da05 upstream.

debugfs.c emits the following warnings when compiling with the -Wsign-conversion flag with clang 15:

drivers/usb/typec/ucsi/debugfs.c:58:27: warning: implicit conversion changes signedness: 'int' to 'u32' (aka 'unsigned int') [-Wsign-conversion]
                ucsi->debugfs->status = ret;
                                      ~ ^~~
drivers/usb/typec/ucsi/debugfs.c:71:25: warning: implicit conversion changes signedness: 'u32' (aka 'unsigned int') to 'int' [-Wsign-conversion]
                return ucsi->debugfs->status;
                ~~~~~~ ~~~~~~~~~~~~~~~^~~~~~

During ucsi_cmd() we see:

	if (ret < 0) {
		ucsi->debugfs->status = ret;
		return ret;
	}

But "status" is u32 meaning unsigned wrap-around occurs when assigning a value which is < 0 to it, this obscures the real status.

To fix this make the "status" of type int since ret is also of type int.

Fixes: df0383f ("usb: typec: ucsi: Add debugfs for ucsi commands")
Cc: [email protected]
Signed-off-by: Qasim Ijaz <[email protected]>
Reviewed-by: Heikki Krogerus <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>
(cherry picked from commit 4490c7951898dc64505533e7979837429bc9e290)
Signed-off-by: Jack Vogel <[email protected]>

Author: qasim-ijaz

drivers/usb/typec/ucsi/ucsi.h

@@ -367,7 +367,7 @@ struct ucsi_debugfs_entry {
 		u64 low;
 		u64 high;
 	} response;
-	u32 status;
+	int status;
 	struct dentry *dentry;
 };