diff options
| author |   Wesley Sheng <wesley.sheng@microchip.com> | 2019-04-15 22:41:42 +0800 |
|---|---|---|
| committer |   Bjorn Helgaas <bhelgaas@google.com> | 2019-04-18 08:31:37 -0500 |
| commit | 083c1b5e50b701899dc32445efa8b153685260d5 (patch) | |
| tree | 5d902d7e6903be1dfebd868a51c702b47623c739 /drivers/pci/switch/switchtec.c | |
| parent | switchtec: Increase PFF limit from 48 to 255 (diff) | |
| download | linux-dev-083c1b5e50b701899dc32445efa8b153685260d5.tar.xz linux-dev-083c1b5e50b701899dc32445efa8b153685260d5.zip | |
switchtec: Fix unintended mask of MRPC event
When running application tool switchtec-user's `firmware update` and `event
wait` commands concurrently, sometimes the firmware update speed reduced
significantly.
It is because when the MRPC event happened after MRPC event occurrence
check but before the event mask loop reaches its header register in event
ISR, the MRPC event would be masked unintentionally. Since there's no
chance to enable it again except for a module reload, all the following
MRPC execution completion checks time out.
Fix this bug by skipping the mask operation for MRPC event in event ISR,
same as what we already do for LINK event.
Fixes: 52eabba5bcdb ("switchtec: Add IOCTLs to the Switchtec driver")
Signed-off-by: Wesley Sheng <wesley.sheng@microchip.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Logan Gunthorpe <logang@deltatee.com>
Diffstat (limited to 'drivers/pci/switch/switchtec.c')
| -rw-r--r-- | drivers/pci/switch/switchtec.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/pci/switch/switchtec.c b/drivers/pci/switch/switchtec.c index 7df9a69f7d93..30f6e080bad8 100644 --- a/drivers/pci/switch/switchtec.c +++ b/drivers/pci/switch/switchtec.c @@ -1177,7 +1177,8 @@ static int mask_event(struct switchtec_dev *stdev, int eid, int idx) if (!(hdr & SWITCHTEC_EVENT_OCCURRED && hdr & SWITCHTEC_EVENT_EN_IRQ)) return 0; - if (eid == SWITCHTEC_IOCTL_EVENT_LINK_STATE) + if (eid == SWITCHTEC_IOCTL_EVENT_LINK_STATE || + eid == SWITCHTEC_IOCTL_EVENT_MRPC_COMP) return 0; dev_dbg(&stdev->dev, "%s: %d %d %x\n", __func__, eid, idx, hdr); |