6.12-stable review patch. If anyone has any objections, please let me know.
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From: Dmitry Torokhov dmitry.torokhov@gmail.com
[ Upstream commit 0e45a09a1da0872786885c505467aab8fb29b5b4 ]
serio_pause_rx() and serio_continue_rx() are usually used together to temporarily stop receiving interrupts/data for a given serio port. Define "serio_pause_rx" guard for this so that the port is always resumed once critical section is over.
Example:
scoped_guard(serio_pause_rx, elo->serio) { elo->expected_packet = toupper(packet[0]); init_completion(&elo->cmd_done); }
Link: https://lore.kernel.org/r/20240905041732.2034348-2-dmitry.torokhov@gmail.com Signed-off-by: Dmitry Torokhov dmitry.torokhov@gmail.com Stable-dep-of: 08bd5b7c9a24 ("Input: synaptics - fix crash when enabling pass-through port") Signed-off-by: Sasha Levin sashal@kernel.org --- include/linux/serio.h | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/include/linux/serio.h b/include/linux/serio.h index bf2191f253509..69a47674af653 100644 --- a/include/linux/serio.h +++ b/include/linux/serio.h @@ -6,6 +6,7 @@ #define _SERIO_H
+#include <linux/cleanup.h> #include <linux/types.h> #include <linux/interrupt.h> #include <linux/list.h> @@ -161,4 +162,6 @@ static inline void serio_continue_rx(struct serio *serio) spin_unlock_irq(&serio->lock); }
+DEFINE_GUARD(serio_pause_rx, struct serio *, serio_pause_rx(_T), serio_continue_rx(_T)) + #endif