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wil6210: protect against sporadic interrupt during suspend flow 

During the suspend flow, wil6210 HW can send sporadic interrupts,
while PCIe bus is not operational.
To prevent that, keep the interrupts disabled during the suspend
flow and re-enable them only after PCIe enablement in resume.

Signed-off-by: Maya Erez <qca_merez@qca.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
This commit is contained in:
Maya Erez 2017-04-05 14:58:09 +03:00 committed by Kalle Valo
parent b819447dfc
commit a3839fbcf0
1 changed files with 12 additions and 1 deletions
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13
drivers/net/wireless/ath/wil6210/pm.c
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@ -80,12 +80,20 @@ int wil_suspend(struct wil6210_priv *wil, bool is_runtime)
}
}
if (wil->platform_ops.suspend)
/* Disable PCIe IRQ to prevent sporadic IRQs when PCIe is suspending */
wil_dbg_pm(wil, "Disabling PCIe IRQ before suspending\n");
wil_disable_irq(wil);
if (wil->platform_ops.suspend) {
rc = wil->platform_ops.suspend(wil->platform_handle);
if (rc)
wil_enable_irq(wil);
}
out:
wil_dbg_pm(wil, "suspend: %s => %d\n",
is_runtime ? "runtime" : "system", rc);
return rc;
}
@ -104,6 +112,9 @@ int wil_resume(struct wil6210_priv *wil, bool is_runtime)
}
}
wil_dbg_pm(wil, "Enabling PCIe IRQ\n");
wil_enable_irq(wil);
/* if netif up, bring hardware up
* During open(), IFF_UP set after actual device method
* invocation. This prevent recursive call to wil_up()