linux-kernel - [PATCH net-next 1/6] net: ipa: introduce a common microcontroller interrupt handler

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Fri, 30 Dec 2022 17:22:25 -0600
From:   Alex Elder <elder@...aro.org>
To:     davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
        pabeni@...hat.com
Cc:     caleb.connolly@...aro.org, mka@...omium.org, evgreen@...omium.org,
        andersson@...nel.org, quic_cpratapa@...cinc.com,
        quic_avuyyuru@...cinc.com, quic_jponduru@...cinc.com,
        quic_subashab@...cinc.com, elder@...nel.org,
        netdev@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH net-next 1/6] net: ipa: introduce a common microcontroller interrupt handler

The prototype for an IPA interrupt handler supplies the IPA
interrupt ID, so it's possible to use a single function to handle
any type of microcontroller interrupt.

Introduce ipa_uc_interrupt_handler(), which calls the event or the
response handler depending on the IRQ ID provided.  Register the new
function as the handler for both microcontroller IPA interrupt types.

The called functions don't use their "irq_id" arguments, so remove
them.

Signed-off-by: Alex Elder <elder@...aro.org>
---
 drivers/net/ipa/ipa_uc.c | 19 +++++++++++++++----
 1 file changed, 15 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ipa/ipa_uc.c b/drivers/net/ipa/ipa_uc.c
index f0ee472810153..0a890b44c09e1 100644
--- a/drivers/net/ipa/ipa_uc.c
+++ b/drivers/net/ipa/ipa_uc.c
@@ -124,7 +124,7 @@ static struct ipa_uc_mem_area *ipa_uc_shared(struct ipa *ipa)
 }
 
 /* Microcontroller event IPA interrupt handler */
-static void ipa_uc_event_handler(struct ipa *ipa, enum ipa_irq_id irq_id)
+static void ipa_uc_event_handler(struct ipa *ipa)
 {
 	struct ipa_uc_mem_area *shared = ipa_uc_shared(ipa);
 	struct device *dev = &ipa->pdev->dev;
@@ -138,7 +138,7 @@ static void ipa_uc_event_handler(struct ipa *ipa, enum ipa_irq_id irq_id)
 }
 
 /* Microcontroller response IPA interrupt handler */
-static void ipa_uc_response_hdlr(struct ipa *ipa, enum ipa_irq_id irq_id)
+static void ipa_uc_response_hdlr(struct ipa *ipa)
 {
 	struct ipa_uc_mem_area *shared = ipa_uc_shared(ipa);
 	struct device *dev = &ipa->pdev->dev;
@@ -170,13 +170,24 @@ static void ipa_uc_response_hdlr(struct ipa *ipa, enum ipa_irq_id irq_id)
 	}
 }
 
+static void ipa_uc_interrupt_handler(struct ipa *ipa, enum ipa_irq_id irq_id)
+{
+	/* Silently ignore anything unrecognized */
+	if (irq_id == IPA_IRQ_UC_0)
+		ipa_uc_event_handler(ipa);
+	else if (irq_id == IPA_IRQ_UC_1)
+		ipa_uc_response_hdlr(ipa);
+}
+
 /* Configure the IPA microcontroller subsystem */
 void ipa_uc_config(struct ipa *ipa)
 {
+	struct ipa_interrupt *interrupt = ipa->interrupt;
+
 	ipa->uc_powered = false;
 	ipa->uc_loaded = false;
-	ipa_interrupt_add(ipa->interrupt, IPA_IRQ_UC_0, ipa_uc_event_handler);
-	ipa_interrupt_add(ipa->interrupt, IPA_IRQ_UC_1, ipa_uc_response_hdlr);
+	ipa_interrupt_add(interrupt, IPA_IRQ_UC_0, ipa_uc_interrupt_handler);
+	ipa_interrupt_add(interrupt, IPA_IRQ_UC_1, ipa_uc_interrupt_handler);
 }
 
 /* Inverse of ipa_uc_config() */
-- 
2.34.1