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From: Lorenzo Pieralisi <lpieralisi@kernel.org>
To: linux-arm-kernel@lists.infradead.org
Cc: linux-kernel@vger.kernel.org,
	Lorenzo Pieralisi <lpieralisi@kernel.org>,
	Sudeep Holla <sudeep.holla@arm.com>
Subject: [PATCH] firmware: arm_ffa: Fix ffa_notification_info_get() IDs handling
Date: Wed,  8 Nov 2023 12:15:49 +0100	[thread overview]
Message-ID: <20231108111549.155974-1-lpieralisi@kernel.org> (raw)

To parse the retrieved ID lists appropriately in
ffa_notification_info_get() the ids_processed variable should not
be pre-incremented - we are dropping an identifier at the
beginning of the list.

Fix it by using the post-increment operator to increment the number
of processed IDs.

Fixes: 3522be48d82b ("firmware: arm_ffa: Implement the NOTIFICATION_INFO_GET interface")
Signed-off-by: Lorenzo Pieralisi <lpieralisi@kernel.org>
Cc: Sudeep Holla <sudeep.holla@arm.com>
---
 drivers/firmware/arm_ffa/driver.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/firmware/arm_ffa/driver.c b/drivers/firmware/arm_ffa/driver.c
index 07b72c679247..ccf91a795c3d 100644
--- a/drivers/firmware/arm_ffa/driver.c
+++ b/drivers/firmware/arm_ffa/driver.c
@@ -782,7 +782,7 @@ static void ffa_notification_info_get(void)
 			if (ids_processed >= max_ids - 1)
 				break;
 
-			part_id = packed_id_list[++ids_processed];
+			part_id = packed_id_list[ids_processed++];
 
 			if (!ids_count[list]) { /* Global Notification */
 				__do_sched_recv_cb(part_id, 0, false);
@@ -794,7 +794,7 @@ static void ffa_notification_info_get(void)
 				if (ids_processed >= max_ids - 1)
 					break;
 
-				vcpu_id = packed_id_list[++ids_processed];
+				vcpu_id = packed_id_list[ids_processed++];
 
 				__do_sched_recv_cb(part_id, vcpu_id, true);
 			}
-- 
2.34.1


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WARNING: multiple messages have this Message-ID (diff)
From: Lorenzo Pieralisi <lpieralisi@kernel.org>
To: linux-arm-kernel@lists.infradead.org
Cc: linux-kernel@vger.kernel.org,
	Lorenzo Pieralisi <lpieralisi@kernel.org>,
	Sudeep Holla <sudeep.holla@arm.com>
Subject: [PATCH] firmware: arm_ffa: Fix ffa_notification_info_get() IDs handling
Date: Wed,  8 Nov 2023 12:15:49 +0100	[thread overview]
Message-ID: <20231108111549.155974-1-lpieralisi@kernel.org> (raw)

To parse the retrieved ID lists appropriately in
ffa_notification_info_get() the ids_processed variable should not
be pre-incremented - we are dropping an identifier at the
beginning of the list.

Fix it by using the post-increment operator to increment the number
of processed IDs.

Fixes: 3522be48d82b ("firmware: arm_ffa: Implement the NOTIFICATION_INFO_GET interface")
Signed-off-by: Lorenzo Pieralisi <lpieralisi@kernel.org>
Cc: Sudeep Holla <sudeep.holla@arm.com>
---
 drivers/firmware/arm_ffa/driver.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/firmware/arm_ffa/driver.c b/drivers/firmware/arm_ffa/driver.c
index 07b72c679247..ccf91a795c3d 100644
--- a/drivers/firmware/arm_ffa/driver.c
+++ b/drivers/firmware/arm_ffa/driver.c
@@ -782,7 +782,7 @@ static void ffa_notification_info_get(void)
 			if (ids_processed >= max_ids - 1)
 				break;
 
-			part_id = packed_id_list[++ids_processed];
+			part_id = packed_id_list[ids_processed++];
 
 			if (!ids_count[list]) { /* Global Notification */
 				__do_sched_recv_cb(part_id, 0, false);
@@ -794,7 +794,7 @@ static void ffa_notification_info_get(void)
 				if (ids_processed >= max_ids - 1)
 					break;
 
-				vcpu_id = packed_id_list[++ids_processed];
+				vcpu_id = packed_id_list[ids_processed++];
 
 				__do_sched_recv_cb(part_id, vcpu_id, true);
 			}
-- 
2.34.1


             reply	other threads:[~2023-11-08 11:16 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-11-08 11:15 Lorenzo Pieralisi [this message]
2023-11-08 11:15 ` [PATCH] firmware: arm_ffa: Fix ffa_notification_info_get() IDs handling Lorenzo Pieralisi
2023-11-08 11:32 ` Sudeep Holla
2023-11-08 11:32   ` Sudeep Holla
2023-11-13 12:24 ` Sudeep Holla
2023-11-13 12:24   ` Sudeep Holla

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