intel_th: Fix user-visible error codes

There are a few places in the driver that end up returning ENOTSUPP to
the user, replace those with EINVAL.

Signed-off-by: Alexander Shishkin <[email protected]>
Reviewed-by: Andy Shevchenko <[email protected]>
Fixes: ba82664 ("intel_th: Add Memory Storage Unit driver")
Cc: [email protected] # v4.4+
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>

Author: virtuoso

drivers/hwtracing/intel_th/msu.c

@@ -761,7 +761,7 @@ static int msc_configure(struct msc *msc)
 	lockdep_assert_held(&msc->buf_mutex);
 
 	if (msc->mode > MSC_MODE_MULTI)
-		return -ENOTSUPP;
+		return -EINVAL;
 
 	if (msc->mode == MSC_MODE_MULTI) {
 		if (msc_win_set_lockout(msc->cur_win, WIN_READY, WIN_INUSE))
@@ -1295,7 +1295,7 @@ static int msc_buffer_alloc(struct msc *msc, unsigned long *nr_pages,
 	} else if (msc->mode == MSC_MODE_MULTI) {
 		ret = msc_buffer_multi_alloc(msc, nr_pages, nr_wins);
 	} else {
-		ret = -ENOTSUPP;
+		ret = -EINVAL;
 	}
 
 	if (!ret) {
@@ -1531,7 +1531,7 @@ static ssize_t intel_th_msc_read(struct file *file, char __user *buf,
 		if (ret >= 0)
 			*ppos = iter->offset;
 	} else {
-		ret = -ENOTSUPP;
+		ret = -EINVAL;
 	}
 
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