diff options
| author |   Subbaraman Narayanamurthy <subbaram@codeaurora.org> | 2021-02-11 19:14:17 -0800 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-02-12 12:26:46 +0100 |
| commit | d19db80a366576d3ffadf2508ed876b4c1faf959 (patch) | |
| tree | ca9deb8f158d49a5bbd62959ec58d844061ef656 /drivers/spmi | |
| parent | Merge tag 'soundwire-2_5.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vkoul/soundwire into char-misc-next (diff) | |
| download | wireguard-linux-d19db80a366576d3ffadf2508ed876b4c1faf959.tar.xz wireguard-linux-d19db80a366576d3ffadf2508ed876b4c1faf959.zip | |
spmi: spmi-pmic-arb: Fix hw_irq overflow
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: stable@vger.kernel.org
Signed-off-by: Subbaraman Narayanamurthy <subbaram@codeaurora.org>
Link: https://lore.kernel.org/r/1612812784-26369-1-git-send-email-subbaram@codeaurora.org
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
Link: https://lore.kernel.org/r/20210212031417.3148936-1-sboyd@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/spmi')
| -rw-r--r-- | drivers/spmi/spmi-pmic-arb.c | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/drivers/spmi/spmi-pmic-arb.c b/drivers/spmi/spmi-pmic-arb.c index de844b412110..bbbd311eda03 100644 --- a/drivers/spmi/spmi-pmic-arb.c +++ b/drivers/spmi/spmi-pmic-arb.c @@ -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; |