在 2022/4/8 下午8:10, Zhu Lingshan 写道:
This commit assign struct ifcvf_hw.nr_vring to the MSIX vector of the
config interrupt by default in ifcvf_request_config_irq().
ifcvf_hw.nr_vring is the most likely and the ideal case for
the device config interrupt handling, means every virtqueue has
an individual MSIX vector(0 ~ nr_vring - 1), and the config interrupt has
its own MSIX vector(number nr_vring).
This change can also make GCC W = 2 happy, silence the
"uninitialized" warning.
Signed-off-by: Zhu Lingshan <[email protected]>
Reviewed-by: Dan Carpenter <[email protected]>
---
drivers/vdpa/ifcvf/ifcvf_main.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/drivers/vdpa/ifcvf/ifcvf_main.c b/drivers/vdpa/ifcvf/ifcvf_main.c
index 4366320fb68d..b500fb941dab 100644
--- a/drivers/vdpa/ifcvf/ifcvf_main.c
+++ b/drivers/vdpa/ifcvf/ifcvf_main.c
@@ -290,13 +290,13 @@ static int ifcvf_request_config_irq(struct ifcvf_adapter
*adapter)
struct ifcvf_hw *vf = &adapter->vf;
int config_vector, ret;
+ /* vector 0 ~ vf->nr_vring for vqs, num vf->nr_vring vector for config interrupt */
The comment is right before this patch, but probably wrong for
MSIX_VECTOR_DEV_SHARED.
+ config_vector = vf->nr_vring;
+
+ /* re-use the vqs vector */
if (vf->msix_vector_status == MSIX_VECTOR_DEV_SHARED)
return 0;
- if (vf->msix_vector_status == MSIX_VECTOR_PER_VQ_AND_CONFIG)
- /* vector 0 ~ vf->nr_vring for vqs, num vf->nr_vring vector for
config interrupt */
- config_vector = vf->nr_vring;
-
if (vf->msix_vector_status == MSIX_VECTOR_SHARED_VQ_AND_CONFIG)
/* vector 0 for vqs and 1 for config interrupt */
config_vector = 1;
Actually, I prefer to use if ... else ... here.
Thanks
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