From: Fenglin Wu <quic_fenglinw@quicinc.com>
To: <linux-arm-msm@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
<sboyd@kernel.org>
Cc: <collinsd@codeaurora.org>, <subbaram@codeaurora.org>,
<quic_fenglinw@quicinc.com>
Subject: [RESEND PATCH v1 3/9] spmi: pmic-arb: check apid against limits before calling irq handler
Date: Fri, 17 Sep 2021 14:32:58 +0800 [thread overview]
Message-ID: <1631860384-26608-4-git-send-email-quic_fenglinw@quicinc.com> (raw)
In-Reply-To: <1631860384-26608-1-git-send-email-quic_fenglinw@quicinc.com>
From: David Collins <collinsd@codeaurora.org>
Check that the apid for an SPMI interrupt falls between the
min_apid and max_apid that can be handled by the APPS processor
before invoking the per-apid interrupt handler:
periph_interrupt().
This avoids an access violation in rare cases where the status
bit is set for an interrupt that is not owned by the APPS
processor.
Signed-off-by: David Collins <collinsd@codeaurora.org>
Signed-off-by: Fenglin Wu <quic_fenglinw@quicinc.com>
---
drivers/spmi/spmi-pmic-arb.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/spmi/spmi-pmic-arb.c b/drivers/spmi/spmi-pmic-arb.c
index 4d7ad004..c4adc06 100644
--- a/drivers/spmi/spmi-pmic-arb.c
+++ b/drivers/spmi/spmi-pmic-arb.c
@@ -535,6 +535,12 @@ static void pmic_arb_chained_irq(struct irq_desc *desc)
id = ffs(status) - 1;
status &= ~BIT(id);
apid = id + i * 32;
+ if (apid < pmic_arb->min_apid
+ || apid > pmic_arb->max_apid) {
+ WARN_ONCE(true, "spurious spmi irq received for apid=%d\n",
+ apid);
+ continue;
+ }
enable = readl_relaxed(
ver_ops->acc_enable(pmic_arb, apid));
if (enable & SPMI_PIC_ACC_ENABLE_BIT)
--
2.7.4
next prev parent reply other threads:[~2021-09-17 6:33 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-17 6:32 [RESEND PATCH v1 0/9] A bunch of fix and optimization patches in spmi-pmic-arb.c Fenglin Wu
2021-09-17 6:32 ` [RESEND PATCH v1 1/9] spmi: pmic-arb: add a print in cleanup_irq Fenglin Wu
2021-10-12 17:46 ` Stephen Boyd
2021-10-13 4:15 ` Fenglin Wu
2021-10-13 19:35 ` Stephen Boyd
2021-10-14 2:26 ` Fenglin Wu
2021-10-15 1:09 ` Stephen Boyd
2021-10-15 1:27 ` Fenglin Wu
2021-10-18 0:16 ` Fenglin Wu
2021-09-17 6:32 ` [RESEND PATCH v1 2/9] spmi: pmic-arb: do not ack and clear peripheral interrupts " Fenglin Wu
2021-09-17 6:32 ` Fenglin Wu [this message]
2021-10-12 18:02 ` [RESEND PATCH v1 3/9] spmi: pmic-arb: check apid against limits before calling irq handler Stephen Boyd
2021-10-13 5:31 ` Fenglin Wu
2021-10-13 19:25 ` Stephen Boyd
2021-10-14 3:11 ` Fenglin Wu
2021-10-15 1:15 ` Stephen Boyd
2021-10-15 1:54 ` Fenglin Wu
2021-09-17 6:32 ` [RESEND PATCH v1 4/9] spmi: pmic-arb: add support to dispatch interrupt based on IRQ status Fenglin Wu
2021-09-17 6:33 ` [RESEND PATCH v1 5/9] spmi: pmic-arb: correct duplicate APID to PPID mapping logic Fenglin Wu
2021-10-12 17:44 ` Stephen Boyd
2021-10-13 5:37 ` Fenglin Wu
2021-09-17 6:33 ` [RESEND PATCH v1 6/9] spmi: pmic-arb: block access for invalid PMIC arbiter v5 SPMI writes Fenglin Wu
2021-09-17 6:33 ` [RESEND PATCH v1 7/9] spmi: pmic-arb: support updating interrupt type flags Fenglin Wu
2021-10-12 17:42 ` Stephen Boyd
2021-10-13 6:27 ` Fenglin Wu
2021-10-13 19:37 ` Stephen Boyd
2021-10-14 3:17 ` Fenglin Wu
2021-09-17 6:33 ` [RESEND PATCH v1 8/9] spmi: pmic-arb: make interrupt support optional Fenglin Wu
2021-10-12 17:41 ` Stephen Boyd
2021-10-13 8:36 ` Fenglin Wu
2021-10-13 19:38 ` Stephen Boyd
2021-10-14 3:20 ` Fenglin Wu
2021-10-15 1:17 ` Stephen Boyd
2021-10-15 1:30 ` Fenglin Wu
2021-09-17 6:33 ` [RESEND PATCH v1 9/9] spmi: pmic-arb: increase SPMI transaction timeout delay Fenglin Wu
-- strict thread matches above, loose matches on Subject: below --
2021-09-01 8:18 [RESEND PATCH v1 0/9] A bunch of fix and optimization patches in spmi-pmic-arb.c Fenglin Wu
2021-09-01 8:18 ` [RESEND PATCH v1 3/9] spmi: pmic-arb: check apid against limits before calling irq handler Fenglin Wu
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1631860384-26608-4-git-send-email-quic_fenglinw@quicinc.com \
--to=quic_fenglinw@quicinc.com \
--cc=collinsd@codeaurora.org \
--cc=linux-arm-msm@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=sboyd@kernel.org \
--cc=subbaram@codeaurora.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).