[PATCH v6 1/4] firmware_loader: expand firmware error codes with up-to-date error

[Marco Felsch <m.felsch@pengutronix.de>]

Add FW_UPLOAD_ERR_DUPLICATE to allow drivers to inform the firmware_loader
framework that the update is not required. This can be the case if the
user provided firmware matches the current running firmware.

Sync lib/test_firmware.c accordingly.

Reviewed-by: Russ Weight <russ.weight@linux.dev>
Reviewed-by: Luis Chamberlain <mcgrof@kernel.org>
Signed-off-by: Marco Felsch <m.felsch@pengutronix.de>
---
 drivers/base/firmware_loader/sysfs_upload.c | 1 +
 include/linux/firmware.h                    | 2 ++
 lib/test_firmware.c                         | 1 +
 3 files changed, 4 insertions(+)

diff --git a/drivers/base/firmware_loader/sysfs_upload.c b/drivers/base/firmware_loader/sysfs_upload.c
index efc33294212fd82bb1a8c426d7430ef96c6620b2..82c4b1fedf4cdd0b41fd9acb0cfc1688d726a6fd 100644
--- a/drivers/base/firmware_loader/sysfs_upload.c
+++ b/drivers/base/firmware_loader/sysfs_upload.c
@@ -28,6 +28,7 @@ static const char * const fw_upload_err_str[] = {
 	[FW_UPLOAD_ERR_RW_ERROR]     = "read-write-error",
 	[FW_UPLOAD_ERR_WEAROUT]	     = "flash-wearout",
 	[FW_UPLOAD_ERR_FW_INVALID]   = "firmware-invalid",
+	[FW_UPLOAD_ERR_DUPLICATE]    = "firmware-duplicate",
 };
 
 static const char *fw_upload_progress(struct device *dev,
diff --git a/include/linux/firmware.h b/include/linux/firmware.h
index 0fa3b027f02f16ffc4a28d4209c3af9319dd8bea..86a2f010e0c1e833d8456cadf21743b9f86dbde5 100644
--- a/include/linux/firmware.h
+++ b/include/linux/firmware.h
@@ -29,6 +29,7 @@ struct firmware {
  * @FW_UPLOAD_ERR_RW_ERROR: read or write to HW failed, see kernel log
  * @FW_UPLOAD_ERR_WEAROUT: FLASH device is approaching wear-out, wait & retry
  * @FW_UPLOAD_ERR_FW_INVALID: invalid firmware file
+ * @FW_UPLOAD_ERR_DUPLICATE: firmware is already up to date (duplicate)
  * @FW_UPLOAD_ERR_MAX: Maximum error code marker
  */
 enum fw_upload_err {
@@ -41,6 +42,7 @@ enum fw_upload_err {
 	FW_UPLOAD_ERR_RW_ERROR,
 	FW_UPLOAD_ERR_WEAROUT,
 	FW_UPLOAD_ERR_FW_INVALID,
+	FW_UPLOAD_ERR_DUPLICATE,
 	FW_UPLOAD_ERR_MAX
 };
 
diff --git a/lib/test_firmware.c b/lib/test_firmware.c
index 7459bba65444d1d153667ab3fc447c375418e938..a822d9641eb4c4db01d9966f76f080ede31027f3 100644
--- a/lib/test_firmware.c
+++ b/lib/test_firmware.c
@@ -1134,6 +1134,7 @@ static const char * const fw_upload_err_str[] = {
 	[FW_UPLOAD_ERR_RW_ERROR]     = "read-write-error",
 	[FW_UPLOAD_ERR_WEAROUT]	     = "flash-wearout",
 	[FW_UPLOAD_ERR_FW_INVALID]   = "firmware-invalid",
+	[FW_UPLOAD_ERR_DUPLICATE]    = "firmware-duplicate",
 };
 
 static void upload_err_inject_error(struct test_firmware_upload *tst,

-- 
2.47.3