Change in flashrom[master]: opaque_master: Add shutdown function in opaque_master struct

[Nico Huber (Code Review)]

Nico Huber has submitted this change. ( https://review.coreboot.org/c/flashrom/+/56823 )

Change subject: opaque_master: Add shutdown function in opaque_master struct
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opaque_master: Add shutdown function in opaque_master struct

With this, register_opaque_master can take care of register_shutdown
as well, and every opaque master only needs to call
register_opaque_master instead of calling both register_opaque_master
and register_shutdown.

Next patches in the chain convert opaque masters to use new API.

BUG=b:185191942
TEST=builds and ninja test from CB:56413

Change-Id: I34183e6bafc787eec54ee4a26b73a40803f3ce99
Signed-off-by: Anastasia Klimchuk 
Reviewed-on: https://review.coreboot.org/c/flashrom/+/56823
Tested-by: build bot (Jenkins) 
Reviewed-by: Edward O'Callaghan 
---
M opaque.c
M programmer.h
2 files changed, 8 insertions(+), 0 deletions(-)

Approvals:
  build bot (Jenkins): Verified
  Edward O'Callaghan: Looks good to me, approved

diff --git a/opaque.c b/opaque.c
index f098ffc..7704ec7 100644
--- a/opaque.c
+++ b/opaque.c
@@ -50,6 +50,13 @@
 {
    struct registered_master rmst = {0};

+	if (mst->shutdown) {
+		if (register_shutdown(mst->shutdown, data)) {
+			mst->shutdown(data); /* cleanup */
+			return 1;
+		}
+	}
+
    if (!mst->probe || !mst->read || !mst->write || !mst->erase) {
    	msg_perr("%s called with incomplete master definition. "
    		 "Please report a bug at [e-mail]\n",
diff --git a/programmer.h b/programmer.h
index ec55987..3de87e5 100644
--- a/programmer.h
+++ b/programmer.h
@@ -443,6 +443,7 @@
    int (*read) (struct flashctx *flash, uint8_t *buf, unsigned int start, unsigned int len);
    int (*write) (struct flashctx *flash, const uint8_t *buf, unsigned int start, unsigned int len);
    int (*erase) (struct flashctx *flash, unsigned int blockaddr, unsigned int blocklen);
+	int (*shutdown)(void *data);
    void *data;
 };
 int register_opaque_master(const struct opaque_master *mst, void *data);