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wil6210: fix for memory corruption upon rmmod

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Driver disabled PCI master before making sure HW is idle.
This caused memory corruption in case HW access system memory after
PCI master got disabled.
The fix is to change uninit sequence. Make sure FW/HW is idle before
disabling PCI

Signed-off-by: Dedy Lansky <qca_dlansky@qca.qualcomm.com>
Signed-off-by: Vladimir Kondratiev <qca_vkondrat@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Dedy Lansky 2014-09-10 16:34:38 +03:00 committed by John W. Linville
parent 6977805973
commit f172b56309
2 changed files with 26 additions and 2 deletions
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26
drivers/net/wireless/ath/wil6210/main.c
View File

@ -20,6 +20,10 @@
#include "wil6210.h"
#include "txrx.h"
#include "wmi.h"
#define WAIT_FOR_DISCONNECT_TIMEOUT_MS 2000
#define WAIT_FOR_DISCONNECT_INTERVAL_MS 10
static bool no_fw_recovery;
module_param(no_fw_recovery, bool, S_IRUGO | S_IWUSR);
@ -631,6 +635,9 @@ int wil_up(struct wil6210_priv *wil)
static int __wil_down(struct wil6210_priv *wil)
{
int iter = WAIT_FOR_DISCONNECT_TIMEOUT_MS /
WAIT_FOR_DISCONNECT_INTERVAL_MS;
WARN_ON(!mutex_is_locked(&wil->mutex));
if (wil->platform_ops.bus_request)
@ -648,7 +655,24 @@ static int __wil_down(struct wil6210_priv *wil)
wil->scan_request = NULL;
}
wil6210_disconnect(wil, NULL);
if (test_bit(wil_status_fwconnected, &wil->status) ||
test_bit(wil_status_fwconnecting, &wil->status))
wmi_send(wil, WMI_DISCONNECT_CMDID, NULL, 0);
/* make sure wil is idle (not connected) */
mutex_unlock(&wil->mutex);
while (iter--) {
int idle = !test_bit(wil_status_fwconnected, &wil->status) &&
!test_bit(wil_status_fwconnecting, &wil->status);
if (idle)
break;
msleep(WAIT_FOR_DISCONNECT_INTERVAL_MS);
}
mutex_lock(&wil->mutex);
if (!iter)
wil_err(wil, "timeout waiting for idle FW/HW\n");
wil_rx_fini(wil);
return 0;

2
drivers/net/wireless/ath/wil6210/pcie_bus.c
View File

@ -233,8 +233,8 @@ static void wil_pcie_remove(struct pci_dev *pdev)
wil_dbg_misc(wil, "%s()\n", __func__);
wil6210_debugfs_remove(wil);
wil_if_pcie_disable(wil);
wil_if_remove(wil);
wil_if_pcie_disable(wil);
if (wil->platform_ops.uninit)
wil->platform_ops.uninit(wil->platform_handle);
wil_if_free(wil);