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wil6210: prevent access to 11AD device if resume fails 

In case wil6210 resume fails, wil6210 suspend function will try
to access the suspended device in the next kernel suspend.
To prevent that, add wil_status_suspended flag to indicate if the
device is already suspended and clear it only if the resume succeeds.

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 14:58:14 +03:00 committed by Kalle Valo
parent 98a830a98d
commit 3161adddf3
2 changed files with 15 additions and 2 deletions
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16
drivers/net/wireless/ath/wil6210/pm.c
View File

@ -71,6 +71,11 @@ int wil_suspend(struct wil6210_priv *wil, bool is_runtime)
wil_dbg_pm(wil, "suspend: %s\n", is_runtime ? "runtime" : "system");
if (test_bit(wil_status_suspended, wil->status)) {
wil_dbg_pm(wil, "trying to suspend while suspended\n");
return 0;
}
/* if netif up, hardware is alive, shut it down */
if (ndev->flags & IFF_UP) {
rc = wil_down(wil);
@ -86,10 +91,14 @@ int wil_suspend(struct wil6210_priv *wil, bool is_runtime)
if (wil->platform_ops.suspend) {
rc = wil->platform_ops.suspend(wil->platform_handle);
if (rc)
if (rc) {
wil_enable_irq(wil);
goto out;
}
}
set_bit(wil_status_suspended, wil->status);
out:
wil_dbg_pm(wil, "suspend: %s => %d\n",
is_runtime ? "runtime" : "system", rc);
@ -117,10 +126,13 @@ int wil_resume(struct wil6210_priv *wil, bool is_runtime)
/* if netif up, bring hardware up
* During open(), IFF_UP set after actual device method
* invocation. This prevent recursive call to wil_up()
* invocation. This prevent recursive call to wil_up().
* wil_status_suspended will be cleared in wil_reset
*/
if (ndev->flags & IFF_UP)
rc = wil_up(wil);
else
clear_bit(wil_status_suspended, wil->status);
out:
wil_dbg_pm(wil, "resume: %s => %d\n",

1
drivers/net/wireless/ath/wil6210/wil6210.h
View File

@ -412,6 +412,7 @@ enum { /* for wil6210_priv.status */
wil_status_irqen, /* FIXME: interrupts enabled - for debug */
wil_status_napi_en, /* NAPI enabled protected by wil->mutex */
wil_status_resetting, /* reset in progress */
wil_status_suspended, /* suspend completed, device is suspended */
wil_status_last /* keep last */
};