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ice: Do not check INTEVENT bit for OICR interrupts 

According to the hardware spec, checking the INTEVENT bit isn't a
reliable way to detect if an OICR interrupt has occurred. This is
because this bit can be cleared by the hardware/firmware before the
interrupt service routine has run. So instead, just check for OICR
events every time.

Fixes: 940b61af02 ("ice: Initialize PF and setup miscellaneous interrupt")
Signed-off-by: Ben Shelton <benjamin.h.shelton@intel.com>
Signed-off-by: Anirudh Venkataramanan <anirudh.venkataramanan@intel.com>
Tested-by: Tony Brelinski <tonyx.brelinski@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Ben Shelton 2018-04-11 12:21:33 -07:00 committed by Jeff Kirsher
parent 34357a90d5
commit 30d84397af
2 changed files with 0 additions and 6 deletions
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2
drivers/net/ethernet/intel/ice/ice_hw_autogen.h
View File

@ -121,8 +121,6 @@
#define PFINT_FW_CTL_CAUSE_ENA_S 30
#define PFINT_FW_CTL_CAUSE_ENA_M BIT(PFINT_FW_CTL_CAUSE_ENA_S)
#define PFINT_OICR 0x0016CA00
#define PFINT_OICR_INTEVENT_S 0
#define PFINT_OICR_INTEVENT_M BIT(PFINT_OICR_INTEVENT_S)
#define PFINT_OICR_HLP_RDY_S 14
#define PFINT_OICR_HLP_RDY_M BIT(PFINT_OICR_HLP_RDY_S)
#define PFINT_OICR_CPM_RDY_S 15

4
drivers/net/ethernet/intel/ice/ice_main.c
View File

@ -1722,9 +1722,6 @@ static irqreturn_t ice_misc_intr(int __always_unused irq, void *data)
oicr = rd32(hw, PFINT_OICR);
ena_mask = rd32(hw, PFINT_OICR_ENA);
if (!(oicr & PFINT_OICR_INTEVENT_M))
goto ena_intr;
if (oicr & PFINT_OICR_GRST_M) {
u32 reset;
/* we have a reset warning */
@ -1782,7 +1779,6 @@ static irqreturn_t ice_misc_intr(int __always_unused irq, void *data)
}
ret = IRQ_HANDLED;
ena_intr:
/* re-enable interrupt causes that are not handled during this pass */
wr32(hw, PFINT_OICR_ENA, ena_mask);
if (!test_bit(__ICE_DOWN, pf->state)) {