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spmi: spmi-pmic-arb: Fix hw_irq overflow

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commit d19db80a366576d3ffadf2508ed876b4c1faf959 upstream.

Currently, when handling the SPMI summary interrupt, the hw_irq
number is calculated based on SID, Peripheral ID, IRQ index and
APID. This is then passed to irq_find_mapping() to see if a
mapping exists for this hw_irq and if available, invoke the
interrupt handler. Since the IRQ index uses an "int" type, hw_irq
which is of unsigned long data type can take a large value when
SID has its MSB set to 1 and the type conversion happens. Because
of this, irq_find_mapping() returns 0 as there is no mapping
for this hw_irq. This ends up invoking cleanup_irq() as if
the interrupt is spurious whereas it is actually a valid
interrupt. Fix this by using the proper data type (u32) for id.

Cc: [email protected]
Signed-off-by: Subbaraman Narayanamurthy <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Stephen Boyd <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>
This commit is contained in:
Subbaraman Narayanamurthy 2021-02-11 19:14:17 -08:00 • committed by Greg Kroah-Hartman
commit 70dcfb66ef
1 changed files with 2 additions and 3 deletions
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5
drivers/spmi/spmi-pmic-arb.c
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@ -1,6 +1,6 @@
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (c) 2012-2015, 2017, The Linux Foundation. All rights reserved.
* Copyright (c) 2012-2015, 2017, 2021, The Linux Foundation. All rights reserved.
*/
#include <linux/bitmap.h>
#include <linux/delay.h>
@ -505,8 +505,7 @@ static void cleanup_irq(struct spmi_pmic_arb *pmic_arb, u16 apid, int id)
static void periph_interrupt(struct spmi_pmic_arb *pmic_arb, u16 apid)
{
unsigned int irq;
u32 status;
int id;
u32 status, id;
u8 sid = (pmic_arb->apid_data[apid].ppid >> 8) & 0xF;
u8 per = pmic_arb->apid_data[apid].ppid & 0xFF;