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serial: 8250_pci: Detach low-level driver during PCI error recovery

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am: 4fa1c65cf0

Change-Id: Iaa90075090ace1338995c9163f277818ade70c91
This commit is contained in:
Gabriel Krisman Bertazi
2017-03-22 12:07:27 +00:00
committed by android-build-merger
parent d8e9999238 4fa1c65cf0
commit 50314d9022
1 changed files with 19 additions and 4 deletions
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23
drivers/tty/serial/8250/8250_pci.c
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@@ -52,6 +52,7 @@ struct serial_private {
struct pci_dev *dev;
unsigned int nr;
struct pci_serial_quirk *quirk;
const struct pciserial_board *board;
int line[0];
};
@@ -3871,6 +3872,7 @@ pciserial_init_ports(struct pci_dev *dev, const struct pciserial_board *board)
}
}
priv->nr = i;
priv->board = board;
return priv;
err_deinit:
@@ -3881,7 +3883,7 @@ err_out:
}
EXPORT_SYMBOL_GPL(pciserial_init_ports);
void pciserial_remove_ports(struct serial_private *priv)
void pciserial_detach_ports(struct serial_private *priv)
{
struct pci_serial_quirk *quirk;
int i;
@@ -3895,7 +3897,11 @@ void pciserial_remove_ports(struct serial_private *priv)
quirk = find_quirk(priv->dev);
if (quirk->exit)
quirk->exit(priv->dev);
}
void pciserial_remove_ports(struct serial_private *priv)
{
pciserial_detach_ports(priv);
kfree(priv);
}
EXPORT_SYMBOL_GPL(pciserial_remove_ports);
@@ -5590,7 +5596,7 @@ static pci_ers_result_t serial8250_io_error_detected(struct pci_dev *dev,
return PCI_ERS_RESULT_DISCONNECT;
if (priv)
pciserial_suspend_ports(priv);
pciserial_detach_ports(priv);
pci_disable_device(dev);
@@ -5615,9 +5621,18 @@ static pci_ers_result_t serial8250_io_slot_reset(struct pci_dev *dev)
static void serial8250_io_resume(struct pci_dev *dev)
{
struct serial_private *priv = pci_get_drvdata(dev);
const struct pciserial_board *board;
if (priv)
pciserial_resume_ports(priv);
if (!priv)
return;
board = priv->board;
kfree(priv);
priv = pciserial_init_ports(dev, board);
if (!IS_ERR(priv)) {
pci_set_drvdata(dev, priv);
}
}
static const struct pci_error_handlers serial8250_err_handler = {