2013-07-15 14:09:26

by Suthikulpanit, Suravee

[permalink] [raw]
Subject: AHCI: ahci Driver crash in ahci_host_activate

I ran into a crash during booting with the latest 3.11.0-rc1. After
investigation, the crash was triggered by the patch below where the "pp"
is NULL in some cases.

Suravee

commit b29900e62598cecd519c9ab2b8e4d03f8ebf702d
Author: Alexander Gordeev <[email protected]>
Date: Wed May 22 08:53:48 2013 +0900

AHCI: Make distinct names for ports in /proc/interrupts

Currently all interrupts assigned to AHCI ports show up in
'/proc/interrupts' as 'ahci'. This fix adds port numbers as
suffixes and hence makes the descriptions distinct.

Reported-by: Jan Beulich <[email protected]>
Signed-off-by: Alexander Gordeev <[email protected]>
Signed-off-by: Tejun Heo <[email protected]>

diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
index 251e57d..4d1c672 100644
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -1142,9 +1142,11 @@ int ahci_host_activate(struct ata_host *host, int
irq, unsigned int n_msis)
return rc;

for (i = 0; i < host->n_ports; i++) {
+ struct ahci_port_priv *pp = host->ports[i]->private_data;
+
rc = devm_request_threaded_irq(host->dev,
irq + i, ahci_hw_interrupt, ahci_thread_fn,
IRQF_SHARED,
- dev_driver_string(host->dev), host->ports[i]);
+ pp->irq_desc, host->ports[i]);
if (rc)
goto out_free_irqs;
}


2013-07-22 21:48:45

by Tejun Heo

[permalink] [raw]
Subject: Re: AHCI: ahci Driver crash in ahci_host_activate

Hello,

On Mon, Jul 15, 2013 at 09:08:40AM -0500, Suravee Suthikulanit wrote:
> I ran into a crash during booting with the latest 3.11.0-rc1. After
> investigation, the crash was triggered by the patch below where the
> "pp" is NULL in some cases.

Yeap, fix is being worked on. Thanks a lot!

--
tejun