linux-kernel - [PATCH v2 3/3] Revert "thunderbolt: Prevent crash if non-active NVMem file is read"

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Date:   Mon, 2 Mar 2020 15:43:29 +0000
From:   Nicholas Johnson <nicholas.johnson-opensource@...look.com.au>
To:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
CC:     Mika Westerberg <mika.westerberg@...ux.intel.com>,
        Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
        Nicholas Johnson <nicholas.johnson-opensource@...look.com.au>
Subject: [PATCH v2 3/3] Revert "thunderbolt: Prevent crash if non-active NVMem
 file is read"

This reverts commit 03cd45d2e219301880cabc357e3cf478a500080f.

Since NVMEM subsystem gained support for write-only instances, this
workaround is no longer required, so drop it.

Signed-off-by: Nicholas Johnson <nicholas.johnson-opensource@...look.com.au>
---
 drivers/thunderbolt/switch.c | 7 -------
 1 file changed, 7 deletions(-)

diff --git a/drivers/thunderbolt/switch.c b/drivers/thunderbolt/switch.c
index 7d6ecc342..ad5479f21 100644
--- a/drivers/thunderbolt/switch.c
+++ b/drivers/thunderbolt/switch.c
@@ -348,12 +348,6 @@ static int tb_switch_nvm_read(void *priv, unsigned int offset, void *val,
 	return ret;
 }
 
-static int tb_switch_nvm_no_read(void *priv, unsigned int offset, void *val,
-				 size_t bytes)
-{
-	return -EPERM;
-}
-
 static int tb_switch_nvm_write(void *priv, unsigned int offset, void *val,
 			       size_t bytes)
 {
@@ -399,7 +393,6 @@ static struct nvmem_device *register_nvmem(struct tb_switch *sw, int id,
 		config.read_only = true;
 	} else {
 		config.name = "nvm_non_active";
-		config.reg_read = tb_switch_nvm_no_read;
 		config.reg_write = tb_switch_nvm_write;
 		config.root_only = true;
 	}
-- 
2.25.1