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From: Thomas Gleixner <tglx@linutronix.de>
To: LKML <linux-kernel@vger.kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>,
	"Ahmed S. Darwish" <a.darwish@linutronix.de>,
	Sebastian Andrzej Siewior <bigeasy@linutronix.de>,
	Felipe Balbi <balbi@kernel.org>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	linux-arm-kernel@lists.infradead.org, linux-usb@vger.kernel.org,
	Thomas Winischhofer <thomas@winischhofer.net>,
	Johan Hovold <johan@kernel.org>,
	Mathias Nyman <mathias.nyman@intel.com>,
	Valentina Manea <valentina.manea.m@gmail.com>,
	Shuah Khan <shuah@kernel.org>,
	Alan Stern <stern@rowland.harvard.edu>,
	linux-omap@vger.kernel.org, Kukjin Kim <kgene@kernel.org>,
	Krzysztof Kozlowski <krzk@kernel.org>,
	linux-samsung-soc@vger.kernel.org,
	Duncan Sands <duncan.sands@free.fr>
Subject: [patch V2 10/13] usb: gadget: pxa27x_udc: Replace in_interrupt() usage in comments
Date: Mon, 19 Oct 2020 12:06:39 +0200	[thread overview]
Message-ID: <20201019101110.636378243@linutronix.de> (raw)
In-Reply-To: <20201019100629.419020859@linutronix.de>

From: Ahmed S. Darwish <a.darwish@linutronix.de>

The usage of in_interrupt() in drivers is phased out for various reasons.

Documenting calling contexts of functions with 'in_interrupt()' or
'!in_interrupt()' is imprecise: For a function which might sleep the
condition is preemptible task context, which is not what '!in_interrupt()'
describes.

Replace the context docummentation with plain text and make them match
reality.

Signed-off-by: Ahmed S. Darwish <a.darwish@linutronix.de>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Felipe Balbi <balbi@kernel.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-usb@vger.kernel.org

---
 drivers/usb/gadget/udc/pxa27x_udc.c |   19 ++++++++++---------
 1 file changed, 10 insertions(+), 9 deletions(-)

--- a/drivers/usb/gadget/udc/pxa27x_udc.c
+++ b/drivers/usb/gadget/udc/pxa27x_udc.c
@@ -304,7 +304,7 @@ static struct pxa_ep *find_pxa_ep(struct
  * update_pxa_ep_matches - update pxa_ep cached values in all udc_usb_ep
  * @udc: pxa udc
  *
- * Context: in_interrupt()
+ * Context: interrupt handler
  *
  * Updates all pxa_ep fields in udc_usb_ep structures, if this field was
  * previously set up (and is not NULL). The update is necessary is a
@@ -859,7 +859,7 @@ static int write_packet(struct pxa_ep *e
  * @ep: pxa physical endpoint
  * @req: usb request
  *
- * Context: callable when in_interrupt()
+ * Context: interrupt handler
  *
  * Unload as many packets as possible from the fifo we use for usb OUT
  * transfers and put them into the request. Caller should have made sure
@@ -997,7 +997,7 @@ static int read_ep0_fifo(struct pxa_ep *
  * @ep: control endpoint
  * @req: request
  *
- * Context: callable when in_interrupt()
+ * Context: interrupt handler
  *
  * Sends a request (or a part of the request) to the control endpoint (ep0 in).
  * If the request doesn't fit, the remaining part will be sent from irq.
@@ -1036,8 +1036,8 @@ static int write_ep0_fifo(struct pxa_ep
  * @_req: usb request
  * @gfp_flags: flags
  *
- * Context: normally called when !in_interrupt, but callable when in_interrupt()
- * in the special case of ep0 setup :
+ * Context: thread context or from the interrupt handler in the
+ * special case of ep0 setup :
  *   (irq->handle_ep0_ctrl_req->gadget_setup->pxa_ep_queue)
  *
  * Returns 0 if succedeed, error otherwise
@@ -1512,7 +1512,8 @@ static int should_disable_udc(struct pxa
  * pxa_udc_pullup - Offer manual D+ pullup control
  * @_gadget: usb gadget using the control
  * @is_active: 0 if disconnect, else connect D+ pullup resistor
- * Context: !in_interrupt()
+ *
+ * Context: task context, might sleep
  *
  * Returns 0 if OK, -EOPNOTSUPP if udc driver doesn't handle D+ pullup
  */
@@ -1560,7 +1561,7 @@ static int pxa_udc_vbus_session(struct u
  * @_gadget: usb gadget
  * @mA: current drawn
  *
- * Context: !in_interrupt()
+ * Context: task context, might sleep
  *
  * Called after a configuration was chosen by a USB host, to inform how much
  * current can be drawn by the device from VBus line.
@@ -1886,7 +1887,7 @@ static void handle_ep0_ctrl_req(struct p
  * @fifo_irq: 1 if triggered by fifo service type irq
  * @opc_irq: 1 if triggered by output packet complete type irq
  *
- * Context : when in_interrupt() or with ep->lock held
+ * Context : interrupt handler
  *
  * Tries to transfer all pending request data into the endpoint and/or
  * transfer all pending data in the endpoint into usb requests.
@@ -2011,7 +2012,7 @@ static void handle_ep0(struct pxa_udc *u
  * Tries to transfer all pending request data into the endpoint and/or
  * transfer all pending data in the endpoint into usb requests.
  *
- * Is always called when in_interrupt() and with ep->lock released.
+ * Is always called from the interrupt handler. ep->lock must not be held.
  */
 static void handle_ep(struct pxa_ep *ep)
 {


  parent reply	other threads:[~2020-10-19 10:18 UTC|newest]

Thread overview: 27+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-10-19 10:06 [patch V2 00/13] USB: Cleanup in_interupt/in_irq/in_atomic() usage Thomas Gleixner
2020-10-19 10:06 ` [patch V2 01/13] USB: sisusbvga: Make console support depend on BROKEN Thomas Gleixner
2020-10-19 10:06 ` [patch V2 02/13] USB: serial: keyspan_pda: Replace in_interrupt() usage Thomas Gleixner
2020-10-25 16:56   ` Johan Hovold
2020-10-26 12:47     ` Sebastian Andrzej Siewior
2020-10-27  8:16       ` Johan Hovold
2020-10-19 10:06 ` [patch V2 03/13] USB: serial: keyspan_pda: Consolidate room query Thomas Gleixner
2020-10-25 17:05   ` Johan Hovold
2020-10-19 10:06 ` [patch V2 04/13] USB: serial: digi_acceleport: Remove in_interrupt() usage Thomas Gleixner
2020-10-25 17:16   ` Johan Hovold
2020-10-26 14:03     ` [PATCH v3 04/13 ] " Sebastian Andrzej Siewior
2020-10-27  8:26       ` Johan Hovold
2020-10-19 10:06 ` [patch V2 05/13] usb: xhci: Remove in_interrupt() checks Thomas Gleixner
2020-10-19 10:06 ` [patch V2 06/13] usb: host: isp1362: Replace in_interrupt() usage Thomas Gleixner
2020-10-28 11:27   ` Greg Kroah-Hartman
2020-10-19 10:06 ` [patch V2 07/13] usbip: Remove in_interrupt() check Thomas Gleixner
2020-10-19 10:06 ` [patch V2 08/13] usb: hosts: Remove in_interrupt() from comments Thomas Gleixner
2020-10-19 16:28   ` Alan Stern
2020-10-19 10:06 ` [patch V2 09/13] USB: host: ehci-pmcmsp: Cleanup usb_hcd_msp_remove() Thomas Gleixner
2020-10-19 16:28   ` Alan Stern
2020-10-19 10:06 ` Thomas Gleixner [this message]
2020-10-19 10:06 ` [patch V2 11/13] usb: gadget: udc: Remove in_interrupt()/in_irq() from comments Thomas Gleixner
2020-10-19 16:28   ` Alan Stern
2020-10-19 10:06 ` [patch V2 12/13] usb: core: Replace in_interrupt() in comments Thomas Gleixner
2020-10-19 16:28   ` Alan Stern
2020-10-19 10:06 ` [patch V2 13/13] usb: atm: Replace in_interrupt() usage in comment Thomas Gleixner
2020-10-19 10:28   ` Duncan Sands

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