[PATCH 6.1 097/197] misc: fastrpc: Mark all sessions as invalid in cb_remove

Greg Kroah-Hartman
2024-02-20T21:03:01Z

From: Ekansh Gupta <quic_ekangupt@quicinc.com>

commit a4e61de63e34860c36a71d1a364edba16fb6203b upstream.

In remoteproc shutdown sequence, rpmsg_remove will get called which
would depopulate all the child nodes that have been created during
rpmsg_probe. This would result in cb_remove call for all the context
banks for the remoteproc. In cb_remove function, session 0 is
getting skipped which is not correct as session 0 will never become
available again. Add changes to mark session 0 also as invalid.

Fixes: f6f9279f2bf0 ("misc: fastrpc: Add Qualcomm fastrpc basic driver model")
Cc: stable <stable@kernel.org>
Signed-off-by: Ekansh Gupta <quic_ekangupt@quicinc.com>
Link: https://lore.kernel.org/r/20240108114833.20480-1-quic_ekangupt@quicinc.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/misc/fastrpc.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/misc/fastrpc.c
+++ b/drivers/misc/fastrpc.c
@@ -1990,7 +1990,7 @@ static int fastrpc_cb_remove(struct plat
int i;

spin_lock_irqsave(&cctx->lock, flags);
- for (i = 1; i < FASTRPC_MAX_SESSIONS; i++) {
+ for (i = 0; i < FASTRPC_MAX_SESSIONS; i++) {
if (cctx->session[i].sid == sess->sid) {
cctx->session[i].valid = false;
cctx->sesscount--;