From: Ahmad Fatoum <a.fatoum@pengutronix.de>
To: barebox@lists.infradead.org
Cc: Ahmad Fatoum <a.fatoum@pengutronix.de>
Subject: [PATCH 10/12] usbgadget: ums: run gadget loop in a background coroutine if possible
Date: Mon, 15 Feb 2021 11:37:03 +0100 [thread overview]
Message-ID: <20210215103704.32537-11-a.fatoum@pengutronix.de> (raw)
In-Reply-To: <20210215103704.32537-1-a.fatoum@pengutronix.de>
With the new fancy poller yield support in place, we can let let the
loop yield in sleep_thread and naturally run in the background. Add this
and wrap it up inside an #ifdef, so the driver can still be used in
blocking mode for the architectures still missing out on poller yield
support.
Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
---
drivers/usb/gadget/f_mass_storage.c | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/drivers/usb/gadget/f_mass_storage.c b/drivers/usb/gadget/f_mass_storage.c
index 9c0076be26d1..c3e6eb933ce7 100644
--- a/drivers/usb/gadget/f_mass_storage.c
+++ b/drivers/usb/gadget/f_mass_storage.c
@@ -287,6 +287,18 @@ static struct usb_gadget_strings fsg_stringtab = {
/*-------------------------------------------------------------------------*/
+#ifdef CONFIG_POLLER_YIELD
+
+#include <linux/completion.h>
+#include <linux/kthread.h>
+
+static inline bool poll(void)
+{
+ return !ctrlc();
+}
+
+#else
+
struct completion { int done; };
#define init_completion(x) do { (x)->done = 0; } while (0)
@@ -331,6 +343,8 @@ static struct task_struct *kthread_run(int (*threadfn)(void *), void *arg,
#define poll() thread_task->threadfn(thread_task->arg)
+#endif
+
#define wait_event(queue, cond) do { poll(); } while (!(cond))
#define wake_up(...) do {} while (0)
--
2.29.2
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next prev parent reply other threads:[~2021-02-15 10:41 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-15 10:36 [PATCH 00/12] poller: run pollers as proper coroutines (green threads) Ahmad Fatoum
2021-02-15 10:36 ` [PATCH 01/12] common: add coroutine support Ahmad Fatoum
2021-02-15 10:36 ` [PATCH 02/12] poller: run pollers as proper coroutines if architecture supports it Ahmad Fatoum
2021-02-15 10:36 ` [PATCH 03/12] ARM: asm: setjmp: annotate setjmp/longjmp for GCC Ahmad Fatoum
2021-02-15 10:36 ` [PATCH 04/12] ARM: asm: setjmp: implement coroutine dependency initjmp() Ahmad Fatoum
2021-02-15 10:36 ` [PATCH 05/12] sandbox: asm: implement setjmp/longjmp/initjmp Ahmad Fatoum
2021-02-15 10:36 ` [PATCH 06/12] poller: command: add new coroutine check Ahmad Fatoum
2021-02-15 10:37 ` [PATCH 07/12] slice: have assert_command_context() yield until true if possible Ahmad Fatoum
2021-02-15 10:37 ` [PATCH 08/12] poller: implement basic Linux-like completion API Ahmad Fatoum
2021-02-15 10:37 ` [PATCH 09/12] include: add kthread wrappers for pollers Ahmad Fatoum
2021-02-15 12:31 ` Sascha Hauer
2021-02-15 10:37 ` Ahmad Fatoum [this message]
2021-02-15 10:37 ` [PATCH 11/12] usbgadget: refactor usbgadget_register to accept array Ahmad Fatoum
2021-02-15 10:37 ` [PATCH 12/12] usbgadget: multi: wire mass storage gadget into composite gadget Ahmad Fatoum
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