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Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1rp5Qo-00000004M78-0HVm; Tue, 26 Mar 2024 11:57:30 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1rp5Ql-00000004M6U-0DyF for linux-arm-kernel@lists.infradead.org; Tue, 26 Mar 2024 11:57:28 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 8C84E2F4; Tue, 26 Mar 2024 04:57:59 -0700 (PDT) Received: from pluto (unknown [172.31.20.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 7562C3F64C; Tue, 26 Mar 2024 04:57:25 -0700 (PDT) Date: Tue, 26 Mar 2024 11:57:23 +0000 From: Cristian Marussi To: Sudeep Holla Cc: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: Re: [PATCH v2 3/5] firmware: arm_scmi: Add message dump traces for bad and unexpected replies Message-ID: References: <20240325204620.1437237-1-cristian.marussi@arm.com> <20240325204620.1437237-4-cristian.marussi@arm.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240326_045727_220376_326F626A X-CRM114-Status: GOOD ( 21.95 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Tue, Mar 26, 2024 at 11:24:38AM +0000, Sudeep Holla wrote: > On Mon, Mar 25, 2024 at 08:46:18PM +0000, Cristian Marussi wrote: > > Trace also late-timed-out, out-of-order and unexpected/spurious messages. > > > > Signed-off-by: Cristian Marussi > > --- > > drivers/firmware/arm_scmi/driver.c | 10 ++++++++++ > > drivers/firmware/arm_scmi/mailbox.c | 4 +++- > > 2 files changed, 13 insertions(+), 1 deletion(-) > > > > diff --git a/drivers/firmware/arm_scmi/driver.c b/drivers/firmware/arm_scmi/driver.c > > index 7fc1c5b1a2a4..207ed1a52d69 100644 > > --- a/drivers/firmware/arm_scmi/driver.c > > +++ b/drivers/firmware/arm_scmi/driver.c > > @@ -861,6 +861,9 @@ scmi_xfer_command_acquire(struct scmi_chan_info *cinfo, u32 msg_hdr) > > "Message for %d type %d is not expected!\n", > > xfer_id, msg_type); > > spin_unlock_irqrestore(&minfo->xfer_lock, flags); > > + > > + scmi_bad_message_trace(cinfo, msg_hdr, MSG_UNEXPECTED); > > + > > return xfer; > > } > > refcount_inc(&xfer->users); > > @@ -885,6 +888,9 @@ scmi_xfer_command_acquire(struct scmi_chan_info *cinfo, u32 msg_hdr) > > dev_err(cinfo->dev, > > "Invalid message type:%d for %d - HDR:0x%X state:%d\n", > > msg_type, xfer_id, msg_hdr, xfer->state); > > + > > + scmi_bad_message_trace(cinfo, msg_hdr, MSG_INVALID); > > + > > /* On error the refcount incremented above has to be dropped */ > > __scmi_xfer_put(minfo, xfer); > > xfer = ERR_PTR(-EINVAL); > > @@ -921,6 +927,9 @@ static void scmi_handle_notification(struct scmi_chan_info *cinfo, > > if (IS_ERR(xfer)) { > > dev_err(dev, "failed to get free message slot (%ld)\n", > > PTR_ERR(xfer)); > > + > > + scmi_bad_message_trace(cinfo, msg_hdr, MSG_NOMEM); > > + > > scmi_clear_channel(info, cinfo); > > return; > > } > > @@ -1040,6 +1049,7 @@ void scmi_rx_callback(struct scmi_chan_info *cinfo, u32 msg_hdr, void *priv) > > break; > > default: > > WARN_ONCE(1, "received unknown msg_type:%d\n", msg_type); > > + scmi_bad_message_trace(cinfo, msg_hdr, MSG_UNKNOWN); > > break; > > } > > } > > diff --git a/drivers/firmware/arm_scmi/mailbox.c b/drivers/firmware/arm_scmi/mailbox.c > > index b8d470417e8f..fb0824af7180 100644 > > --- a/drivers/firmware/arm_scmi/mailbox.c > > +++ b/drivers/firmware/arm_scmi/mailbox.c > > @@ -56,7 +56,9 @@ static void rx_callback(struct mbox_client *cl, void *m) > > */ > > if (cl->knows_txdone && !shmem_channel_free(smbox->shmem)) { > > dev_warn(smbox->cinfo->dev, "Ignoring spurious A2P IRQ !\n"); > > - return; > > + return scmi_bad_message_trace(smbox->cinfo, > > + shmem_read_header(smbox->shmem), > > + MSG_MBOX_SPURIOUS); > > From previous patch, IIUC scmi_bad_message_trace is a void func and doesn't > return anything. Did you not get any build error/warning for this ? > No...I am building with W=1....but note that the caller itself here rx_callback() is supposed to return a void... ...in V3 I may just split this into 2 lines and leave the return; alone on its own line to avoid any confusion... Thanks, Cristian _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel