| Message ID | 20210706181618.27960-9-don.brace@microchip.com (mailing list archive) |
|---|---|
| State | Superseded |
| Headers | show |
| Series | smartpqi updates | expand |
Dear Don, dear Mike, Am 06.07.21 um 20:16 schrieb Don Brace: > From: Mike McGowen <mike.mcgowen@microchip.com> > > Correct driver's ISR accessing a data structure member > that has not been fully initialized during driver init. Does that crash the Linux kernel? > - The pqi queue groups can be null when an interrupt fires. If it fixes a crash(?), please add a Fixes: tag so it can be backported to the stable series. > Reviewed-by: Kevin Barnett <kevin.barnett@microchip.com> > Reviewed-by: Scott Benesh <scott.benesh@microchip.com> > Reviewed-by: Scott Teel <scott.teel@microchip.com> > Signed-off-by: Mike McGowen <mike.mcgowen@microchip.com> > Signed-off-by: Don Brace <don.brace@microchip.com> > --- > drivers/scsi/smartpqi/smartpqi_init.c | 4 ++-- > 1 file changed, 2 insertions(+), 2 deletions(-) > > diff --git a/drivers/scsi/smartpqi/smartpqi_init.c b/drivers/scsi/smartpqi/smartpqi_init.c > index 6f2263abaa8c..eeaf0568b5e3 100644 > --- a/drivers/scsi/smartpqi/smartpqi_init.c > +++ b/drivers/scsi/smartpqi/smartpqi_init.c > @@ -7757,11 +7757,11 @@ static int pqi_ctrl_init(struct pqi_ctrl_info *ctrl_info) > > pqi_init_operational_queues(ctrl_info); > > - rc = pqi_request_irqs(ctrl_info); > + rc = pqi_create_queues(ctrl_info); From a quick look, these two functions are quite different. It’d be great if you elaborated a bit in the commit message, what else the new function does. Also, with this change, `pqi_request_irqs()` does not seem to have any users anymore. Without your patch: $ git grep pqi_request_irqs drivers/scsi/smartpqi/smartpqi_init.c:static int pqi_request_irqs(struct pqi_ctrl_info *ctrl_info) drivers/scsi/smartpqi/smartpqi_init.c: rc = pqi_request_irqs(ctrl_info); > if (rc) > return rc; > > - rc = pqi_create_queues(ctrl_info); > + rc = pqi_request_irqs(ctrl_info); > if (rc) > return rc; > Kind regards, Paul
From: Paul Menzel [mailto:pmenzel@molgen.mpg.de] Subject: Re: [smartpqi updates PATCH 8/9] smartpqi: fix isr accessing null structure member Dear Don, dear Mike, Am 06.07.21 um 20:16 schrieb Don Brace: > From: Mike McGowen <mike.mcgowen@microchip.com> > > Correct driver's ISR accessing a data structure member that has not > been fully initialized during driver init. Does that crash the Linux kernel? Don: No. I updated the title and description to reflect this. It resulted in some brief access to uninitialized members. This was found during some internal testing, no bugs were ever filed for this change. Thanks for your review. > - The pqi queue groups can be null when an interrupt fires. If it fixes a crash(?), please add a Fixes: tag so it can be backported to the stable series. Kind regards, Paul
diff --git a/drivers/scsi/smartpqi/smartpqi_init.c b/drivers/scsi/smartpqi/smartpqi_init.c index 6f2263abaa8c..eeaf0568b5e3 100644 --- a/drivers/scsi/smartpqi/smartpqi_init.c +++ b/drivers/scsi/smartpqi/smartpqi_init.c @@ -7757,11 +7757,11 @@ static int pqi_ctrl_init(struct pqi_ctrl_info *ctrl_info) pqi_init_operational_queues(ctrl_info); - rc = pqi_request_irqs(ctrl_info); + rc = pqi_create_queues(ctrl_info); if (rc) return rc; - rc = pqi_create_queues(ctrl_info); + rc = pqi_request_irqs(ctrl_info); if (rc) return rc;