regmap: spmi: Fix regmap_spmi_ext_read in multi-byte case

[ Upstream commit dec8e8f ]

Specifically for the case of reads that use the Extended Register
Read Long command, a multi-byte read operation is broken up into
8-byte chunks.  However the call to spmi_ext_register_readl() is
incorrectly passing 'val_size', which if greater than 8 will
always fail.  The argument should instead be 'len'.

Fixes: c9afbb0 ("regmap: spmi: support base and extended register spaces")
Signed-off-by: Jack Pham <[email protected]>
Signed-off-by: Mark Brown <[email protected]>
Cc: [email protected]
Signed-off-by: Sasha Levin <[email protected]>

drivers/base/regmap/regmap-spmi.c

@@ -153,7 +153,7 @@ static int regmap_spmi_ext_read(void *context,
 	while (val_size) {
 		len = min_t(size_t, val_size, 8);
 
-		err = spmi_ext_register_readl(context, addr, val, val_size);
+		err = spmi_ext_register_readl(context, addr, val, len);
 		if (err)
 			goto err_out;