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Commit 47bbea41 authored by Ming Lei's avatar Ming Lei Committed by David S. Miller
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usbnet: smsc75xx: apply the introduced usbnet_{read|write}_cmd_nopm 

This patch applies the introduced usbnet_read_cmd_nopm() and
usbnet_write_cmd_nopm() in the callback of resume and suspend
to avoid deadlock if USB runtime PM is considered into
usbnet_read_cmd() and usbnet_write_cmd().

Cc: Steve Glendinning <steve.glendinning@shawell.net>
Signed-off-by: default avatarMing Lei <ming.lei@canonical.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 0547fad2
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Inline Side-by-side
Showing with 90 additions and 57 deletions
drivers/net/usb/smsc75xx.c
View file @ 47bbea41
......@@ -85,18 +85,23 @@ static bool turbo_mode = true;
module_param(turbo_mode, bool, 0644);
MODULE_PARM_DESC(turbo_mode, "Enable multiple frames per Rx transaction");
static int __must_check smsc75xx_read_reg(struct usbnet *dev, u32 index,
u32 *data)
static int __must_check __smsc75xx_read_reg(struct usbnet *dev, u32 index,
u32 *data, int in_pm)
{
u32 buf;
int ret;
int (*fn)(struct usbnet *, u8, u8, u16, u16, void *, u16);
BUG_ON(!dev);
ret = usbnet_read_cmd(dev, USB_VENDOR_REQUEST_READ_REGISTER,
USB_DIR_IN | USB_TYPE_VENDOR |
USB_RECIP_DEVICE,
0, index, &buf, 4);
if (!in_pm)
fn = usbnet_read_cmd;
else
fn = usbnet_read_cmd_nopm;
ret = fn(dev, USB_VENDOR_REQUEST_READ_REGISTER, USB_DIR_IN
| USB_TYPE_VENDOR | USB_RECIP_DEVICE,
0, index, &buf, 4);
if (unlikely(ret < 0))
netdev_warn(dev->net,
"Failed to read reg index 0x%08x: %d", index, ret);
......@@ -107,21 +112,26 @@ static int __must_check smsc75xx_read_reg(struct usbnet *dev, u32 index,
return ret;
}
static int __must_check smsc75xx_write_reg(struct usbnet *dev, u32 index,
u32 data)
static int __must_check __smsc75xx_write_reg(struct usbnet *dev, u32 index,
u32 data, int in_pm)
{
u32 buf;
int ret;
int (*fn)(struct usbnet *, u8, u8, u16, u16, const void *, u16);
BUG_ON(!dev);
if (!in_pm)
fn = usbnet_write_cmd;
else
fn = usbnet_write_cmd_nopm;
buf = data;
cpu_to_le32s(&buf);
ret = usbnet_write_cmd(dev, USB_VENDOR_REQUEST_WRITE_REGISTER,
USB_DIR_OUT | USB_TYPE_VENDOR |
USB_RECIP_DEVICE,
0, index, &buf, 4);
ret = fn(dev, USB_VENDOR_REQUEST_WRITE_REGISTER, USB_DIR_OUT
| USB_TYPE_VENDOR | USB_RECIP_DEVICE,
0, index, &buf, 4);
if (unlikely(ret < 0))
netdev_warn(dev->net,
"Failed to write reg index 0x%08x: %d", index, ret);
......@@ -129,16 +139,38 @@ static int __must_check smsc75xx_write_reg(struct usbnet *dev, u32 index,
return ret;
}
static int __must_check smsc75xx_read_reg_nopm(struct usbnet *dev, u32 index,
u32 *data)
{
return __smsc75xx_read_reg(dev, index, data, 1);
}
static int __must_check smsc75xx_write_reg_nopm(struct usbnet *dev, u32 index,
u32 data)
{
return __smsc75xx_write_reg(dev, index, data, 1);
}
static int __must_check smsc75xx_read_reg(struct usbnet *dev, u32 index,
u32 *data)
{
return __smsc75xx_read_reg(dev, index, data, 0);
}
static int __must_check smsc75xx_write_reg(struct usbnet *dev, u32 index,
u32 data)
{
return __smsc75xx_write_reg(dev, index, data, 0);
}
static int smsc75xx_set_feature(struct usbnet *dev, u32 feature)
{
if (WARN_ON_ONCE(!dev))
return -EINVAL;
cpu_to_le32s(&feature);
return usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0),
USB_REQ_SET_FEATURE, USB_RECIP_DEVICE, feature, 0, NULL, 0,
USB_CTRL_SET_TIMEOUT);
return usbnet_write_cmd_nopm(dev, USB_REQ_SET_FEATURE,
USB_DIR_OUT | USB_RECIP_DEVICE,
feature, 0, NULL, 0);
}
static int smsc75xx_clear_feature(struct usbnet *dev, u32 feature)
......@@ -146,11 +178,9 @@ static int smsc75xx_clear_feature(struct usbnet *dev, u32 feature)
if (WARN_ON_ONCE(!dev))
return -EINVAL;
cpu_to_le32s(&feature);
return usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0),
USB_REQ_CLEAR_FEATURE, USB_RECIP_DEVICE, feature, 0, NULL, 0,
USB_CTRL_SET_TIMEOUT);
return usbnet_write_cmd_nopm(dev, USB_REQ_CLEAR_FEATURE,
USB_DIR_OUT | USB_RECIP_DEVICE,
feature, 0, NULL, 0);
}
/* Loop until the read is completed with timeout
......@@ -796,13 +826,16 @@ static int smsc75xx_set_features(struct net_device *netdev,
return 0;
}
static int smsc75xx_wait_ready(struct usbnet *dev)
static int smsc75xx_wait_ready(struct usbnet *dev, int in_pm)
{
int timeout = 0;
do {
u32 buf;
int ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
int ret;
ret = __smsc75xx_read_reg(dev, PMT_CTL, &buf, in_pm);
check_warn_return(ret, "Failed to read PMT_CTL: %d", ret);
if (buf & PMT_CTL_DEV_RDY)
......@@ -824,7 +857,7 @@ static int smsc75xx_reset(struct usbnet *dev)
netif_dbg(dev, ifup, dev->net, "entering smsc75xx_reset");
ret = smsc75xx_wait_ready(dev);
ret = smsc75xx_wait_ready(dev, 0);
check_warn_return(ret, "device not ready in smsc75xx_reset");
ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
......@@ -1191,30 +1224,30 @@ static int smsc75xx_suspend(struct usb_interface *intf, pm_message_t message)
netdev_info(dev->net, "entering SUSPEND2 mode");
/* disable energy detect (link up) & wake up events */
ret = smsc75xx_read_reg(dev, WUCSR, &val);
ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
check_warn_return(ret, "Error reading WUCSR");
val &= ~(WUCSR_MPEN | WUCSR_WUEN);
ret = smsc75xx_write_reg(dev, WUCSR, val);
ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
check_warn_return(ret, "Error writing WUCSR");
ret = smsc75xx_read_reg(dev, PMT_CTL, &val);
ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
check_warn_return(ret, "Error reading PMT_CTL");
val &= ~(PMT_CTL_ED_EN | PMT_CTL_WOL_EN);
ret = smsc75xx_write_reg(dev, PMT_CTL, val);
ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
check_warn_return(ret, "Error writing PMT_CTL");
/* enter suspend2 mode */
ret = smsc75xx_read_reg(dev, PMT_CTL, &val);
ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
check_warn_return(ret, "Error reading PMT_CTL");
val &= ~(PMT_CTL_SUS_MODE | PMT_CTL_WUPS | PMT_CTL_PHY_RST);
val |= PMT_CTL_SUS_MODE_2;
ret = smsc75xx_write_reg(dev, PMT_CTL, val);
ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
check_warn_return(ret, "Error writing PMT_CTL");
return 0;
......@@ -1225,7 +1258,7 @@ static int smsc75xx_suspend(struct usb_interface *intf, pm_message_t message)
/* disable all filters */
for (i = 0; i < WUF_NUM; i++) {
ret = smsc75xx_write_reg(dev, WUF_CFGX + i * 4, 0);
ret = smsc75xx_write_reg_nopm(dev, WUF_CFGX + i * 4, 0);
check_warn_return(ret, "Error writing WUF_CFGX");
}
......@@ -1250,95 +1283,95 @@ static int smsc75xx_suspend(struct usb_interface *intf, pm_message_t message)
}
/* clear any pending pattern match packet status */
ret = smsc75xx_read_reg(dev, WUCSR, &val);
ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
check_warn_return(ret, "Error reading WUCSR");
val |= WUCSR_WUFR;
ret = smsc75xx_write_reg(dev, WUCSR, val);
ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
check_warn_return(ret, "Error writing WUCSR");
netdev_info(dev->net, "enabling packet match detection");
ret = smsc75xx_read_reg(dev, WUCSR, &val);
ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
check_warn_return(ret, "Error reading WUCSR");
val |= WUCSR_WUEN;
ret = smsc75xx_write_reg(dev, WUCSR, val);
ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
check_warn_return(ret, "Error writing WUCSR");
} else {
netdev_info(dev->net, "disabling packet match detection");
ret = smsc75xx_read_reg(dev, WUCSR, &val);
ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
check_warn_return(ret, "Error reading WUCSR");
val &= ~WUCSR_WUEN;
ret = smsc75xx_write_reg(dev, WUCSR, val);
ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
check_warn_return(ret, "Error writing WUCSR");
}
/* disable magic, bcast & unicast wakeup sources */
ret = smsc75xx_read_reg(dev, WUCSR, &val);
ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
check_warn_return(ret, "Error reading WUCSR");
val &= ~(WUCSR_MPEN | WUCSR_BCST_EN | WUCSR_PFDA_EN);
ret = smsc75xx_write_reg(dev, WUCSR, val);
ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
check_warn_return(ret, "Error writing WUCSR");
if (pdata->wolopts & WAKE_MAGIC) {
netdev_info(dev->net, "enabling magic packet wakeup");
ret = smsc75xx_read_reg(dev, WUCSR, &val);
ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
check_warn_return(ret, "Error reading WUCSR");
/* clear any pending magic packet status */
val |= WUCSR_MPR | WUCSR_MPEN;
ret = smsc75xx_write_reg(dev, WUCSR, val);
ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
check_warn_return(ret, "Error writing WUCSR");
}
if (pdata->wolopts & WAKE_BCAST) {
netdev_info(dev->net, "enabling broadcast detection");
ret = smsc75xx_read_reg(dev, WUCSR, &val);
ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
check_warn_return(ret, "Error reading WUCSR");
val |= WUCSR_BCAST_FR | WUCSR_BCST_EN;
ret = smsc75xx_write_reg(dev, WUCSR, val);
ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
check_warn_return(ret, "Error writing WUCSR");
}
if (pdata->wolopts & WAKE_UCAST) {
netdev_info(dev->net, "enabling unicast detection");
ret = smsc75xx_read_reg(dev, WUCSR, &val);
ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
check_warn_return(ret, "Error reading WUCSR");
val |= WUCSR_WUFR | WUCSR_PFDA_EN;
ret = smsc75xx_write_reg(dev, WUCSR, val);
ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
check_warn_return(ret, "Error writing WUCSR");
}
/* enable receiver to enable frame reception */
ret = smsc75xx_read_reg(dev, MAC_RX, &val);
ret = smsc75xx_read_reg_nopm(dev, MAC_RX, &val);
check_warn_return(ret, "Failed to read MAC_RX: %d", ret);
val |= MAC_RX_RXEN;
ret = smsc75xx_write_reg(dev, MAC_RX, val);
ret = smsc75xx_write_reg_nopm(dev, MAC_RX, val);
check_warn_return(ret, "Failed to write MAC_RX: %d", ret);
/* some wol options are enabled, so enter SUSPEND0 */
netdev_info(dev->net, "entering SUSPEND0 mode");
ret = smsc75xx_read_reg(dev, PMT_CTL, &val);
ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
check_warn_return(ret, "Error reading PMT_CTL");
val &= (~(PMT_CTL_SUS_MODE | PMT_CTL_PHY_RST));
val |= PMT_CTL_SUS_MODE_0 | PMT_CTL_WOL_EN | PMT_CTL_WUPS;
ret = smsc75xx_write_reg(dev, PMT_CTL, val);
ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
check_warn_return(ret, "Error writing PMT_CTL");
smsc75xx_set_feature(dev, USB_DEVICE_REMOTE_WAKEUP);
......@@ -1359,37 +1392,37 @@ static int smsc75xx_resume(struct usb_interface *intf)
smsc75xx_clear_feature(dev, USB_DEVICE_REMOTE_WAKEUP);
/* Disable wakeup sources */
ret = smsc75xx_read_reg(dev, WUCSR, &val);
ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
check_warn_return(ret, "Error reading WUCSR");
val &= ~(WUCSR_WUEN | WUCSR_MPEN | WUCSR_PFDA_EN
| WUCSR_BCST_EN);
ret = smsc75xx_write_reg(dev, WUCSR, val);
ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
check_warn_return(ret, "Error writing WUCSR");
/* clear wake-up status */
ret = smsc75xx_read_reg(dev, PMT_CTL, &val);
ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
check_warn_return(ret, "Error reading PMT_CTL");
val &= ~PMT_CTL_WOL_EN;
val |= PMT_CTL_WUPS;
ret = smsc75xx_write_reg(dev, PMT_CTL, val);
ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
check_warn_return(ret, "Error writing PMT_CTL");
} else {
netdev_info(dev->net, "resuming from SUSPEND2");
ret = smsc75xx_read_reg(dev, PMT_CTL, &val);
ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
check_warn_return(ret, "Error reading PMT_CTL");
val |= PMT_CTL_PHY_PWRUP;
ret = smsc75xx_write_reg(dev, PMT_CTL, val);
ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
check_warn_return(ret, "Error writing PMT_CTL");
}
ret = smsc75xx_wait_ready(dev);
ret = smsc75xx_wait_ready(dev, 1);
check_warn_return(ret, "device not ready in smsc75xx_resume");
return usbnet_resume(intf);
......
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