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git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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3161adddf3
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>
141 lines
3.7 KiB
C
141 lines
3.7 KiB
C
/*
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* Copyright (c) 2014,2017 Qualcomm Atheros, Inc.
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include "wil6210.h"
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int wil_can_suspend(struct wil6210_priv *wil, bool is_runtime)
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{
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int rc = 0;
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struct wireless_dev *wdev = wil->wdev;
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wil_dbg_pm(wil, "can_suspend: %s\n", is_runtime ? "runtime" : "system");
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if (!netif_running(wil_to_ndev(wil))) {
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/* can always sleep when down */
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wil_dbg_pm(wil, "Interface is down\n");
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goto out;
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}
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if (test_bit(wil_status_resetting, wil->status)) {
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wil_dbg_pm(wil, "Delay suspend when resetting\n");
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rc = -EBUSY;
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goto out;
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}
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if (wil->recovery_state != fw_recovery_idle) {
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wil_dbg_pm(wil, "Delay suspend during recovery\n");
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rc = -EBUSY;
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goto out;
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}
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/* interface is running */
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switch (wdev->iftype) {
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case NL80211_IFTYPE_MONITOR:
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case NL80211_IFTYPE_STATION:
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case NL80211_IFTYPE_P2P_CLIENT:
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if (test_bit(wil_status_fwconnecting, wil->status)) {
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wil_dbg_pm(wil, "Delay suspend when connecting\n");
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rc = -EBUSY;
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goto out;
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}
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break;
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/* AP-like interface - can't suspend */
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default:
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wil_dbg_pm(wil, "AP-like interface\n");
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rc = -EBUSY;
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break;
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}
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out:
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wil_dbg_pm(wil, "can_suspend: %s => %s (%d)\n",
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is_runtime ? "runtime" : "system", rc ? "No" : "Yes", rc);
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return rc;
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}
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int wil_suspend(struct wil6210_priv *wil, bool is_runtime)
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{
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int rc = 0;
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struct net_device *ndev = wil_to_ndev(wil);
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wil_dbg_pm(wil, "suspend: %s\n", is_runtime ? "runtime" : "system");
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if (test_bit(wil_status_suspended, wil->status)) {
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wil_dbg_pm(wil, "trying to suspend while suspended\n");
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return 0;
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}
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/* if netif up, hardware is alive, shut it down */
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if (ndev->flags & IFF_UP) {
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rc = wil_down(wil);
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if (rc) {
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wil_err(wil, "wil_down : %d\n", rc);
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goto out;
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}
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}
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/* Disable PCIe IRQ to prevent sporadic IRQs when PCIe is suspending */
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wil_dbg_pm(wil, "Disabling PCIe IRQ before suspending\n");
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wil_disable_irq(wil);
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if (wil->platform_ops.suspend) {
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rc = wil->platform_ops.suspend(wil->platform_handle);
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if (rc) {
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wil_enable_irq(wil);
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goto out;
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}
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}
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set_bit(wil_status_suspended, wil->status);
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out:
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wil_dbg_pm(wil, "suspend: %s => %d\n",
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is_runtime ? "runtime" : "system", rc);
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return rc;
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}
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int wil_resume(struct wil6210_priv *wil, bool is_runtime)
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{
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int rc = 0;
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struct net_device *ndev = wil_to_ndev(wil);
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wil_dbg_pm(wil, "resume: %s\n", is_runtime ? "runtime" : "system");
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if (wil->platform_ops.resume) {
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rc = wil->platform_ops.resume(wil->platform_handle);
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if (rc) {
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wil_err(wil, "platform_ops.resume : %d\n", rc);
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goto out;
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}
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}
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wil_dbg_pm(wil, "Enabling PCIe IRQ\n");
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wil_enable_irq(wil);
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/* if netif up, bring hardware up
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* During open(), IFF_UP set after actual device method
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* invocation. This prevent recursive call to wil_up().
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* wil_status_suspended will be cleared in wil_reset
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*/
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if (ndev->flags & IFF_UP)
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rc = wil_up(wil);
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else
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clear_bit(wil_status_suspended, wil->status);
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out:
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wil_dbg_pm(wil, "resume: %s => %d\n",
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is_runtime ? "runtime" : "system", rc);
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return rc;
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}
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