On Thu, Apr 02, 2020 at 05:43:49PM +0200, Frederic Barrat wrote: > xive is already mapping the trigger page in kernel space and it can be > accessed through standard APIs, so let's reuse it and simplify the code. > > Signed-off-by: Frederic Barrat <fbar...@linux.ibm.com> > --- > drivers/scsi/cxlflash/ocxl_hw.c | 17 +++++++---------- > drivers/scsi/cxlflash/ocxl_hw.h | 1 - > 2 files changed, 7 insertions(+), 11 deletions(-) > > diff --git a/drivers/scsi/cxlflash/ocxl_hw.c b/drivers/scsi/cxlflash/ocxl_hw.c > index 7018cd802569..59452850f71c 100644 > --- a/drivers/scsi/cxlflash/ocxl_hw.c > +++ b/drivers/scsi/cxlflash/ocxl_hw.c > @@ -15,7 +15,8 @@ > #include <linux/pseudo_fs.h> > #include <linux/poll.h> > #include <linux/sched/signal.h> > - > +#include <linux/interrupt.h> > +#include <asm/xive.h> > #include <misc/ocxl.h> > > #include <uapi/misc/cxl.h> > @@ -180,7 +181,7 @@ static int afu_map_irq(u64 flags, struct > ocxlflash_context *ctx, int num, > struct ocxl_hw_afu *afu = ctx->hw_afu; > struct device *dev = afu->dev; > struct ocxlflash_irqs *irq; > - void __iomem *vtrig; > + struct xive_irq_data *xd; > u32 virq; > int rc = 0; > > @@ -204,15 +205,14 @@ static int afu_map_irq(u64 flags, struct > ocxlflash_context *ctx, int num, > goto err1; > } > > - vtrig = ioremap(irq->ptrig, PAGE_SIZE); > - if (unlikely(!vtrig)) { > - dev_err(dev, "%s: Trigger page mapping failed\n", __func__); > - rc = -ENOMEM; > + xd = irq_get_handler_data(virq); > + if (unlikely(!xd)) { > + dev_err(dev, "%s: Can't get interrupt data\n", __func__);
The removal of setting the return code injects a bug should this error leg ever be encountered. So we should either keep the rc statement e.g. -EINVAL, -ENXIO, -ENODEV, etc., or remove this error leg. I lean towards keeping the statement. > goto err2; > } > > irq->virq = virq; > - irq->vtrig = vtrig; > + irq->vtrig = xd->trig_mmio; > out: >