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fwu: fix fwu_get_image_index interface

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The capsule update uses the DFU framework for updating
storage. fwu_get_image_index() currently returns the
image_index calculated by (dfu_alt_num + 1), but this is
different from the image_index in UEFI terminology.

Since capsule update implementation calls dfu_write_by_alt
function, it is better that FWU returns the dfu_alt_num.

Signed-off-by: Masahisa Kojima <masahisa.kojima@linaro.org>
Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
This commit is contained in:
Masahisa Kojima
2024-01-11 14:35:39 +09:00
committed by Heinrich Schuchardt
parent f19171c919
commit af7a34acfd
3 changed files with 26 additions and 30 deletions
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13
include/fwu.h
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@@ -122,21 +122,18 @@ int fwu_get_active_index(uint *active_idxp);
int fwu_set_active_index(uint active_idx);
/**
* fwu_get_image_index() - Get the Image Index to be used for capsule update
* @image_index: The Image Index for the image
*
* The FWU multi bank update feature computes the value of image_index at
* runtime, based on the bank to which the image needs to be written to.
* Derive the image_index value for the image.
* fwu_get_dfu_alt_num() - Get the dfu_alt_num to be used for capsule update
* @image_index: The Image Index for the image
* @alt_num: pointer to store dfu_alt_num
*
* Currently, the capsule update driver uses the DFU framework for
* the updates. This function gets the DFU alt number which is to
* be used as the Image Index
* be used for capsule update.
*
* Return: 0 if OK, -ve on error
*
*/
int fwu_get_image_index(u8 *image_index);
int fwu_get_dfu_alt_num(u8 image_index, u8 *alt_num);
/**
* fwu_revert_boot_index() - Revert the active index in the FWU metadata