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xen-pciback: properly clean up after calling pcistub_device_find()
As the function calls pcistub_device_get() before returning non-NULL, its callers need to take care of calling pcistub_device_put() on (mostly, but not exclusively) error paths. Otoh, the function already guarantees that the 'dev' member is non-NULL upon successful return, so callers do not need to check for this a second time. Signed-off-by: Jan Beulich <jbeulich@suse.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
This commit is contained in:
parent
aa387d630c
commit
e6aa70a0d5
1 changed files with 23 additions and 23 deletions
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@ -681,14 +681,14 @@ static pci_ers_result_t xen_pcibk_slot_reset(struct pci_dev *dev)
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dev_err(&dev->dev, DRV_NAME " device is not connected or owned"
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" by HVM, kill it\n");
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kill_domain_by_device(psdev);
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goto release;
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goto end;
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}
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if (!test_bit(_XEN_PCIB_AERHANDLER,
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(unsigned long *)&psdev->pdev->sh_info->flags)) {
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dev_err(&dev->dev,
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"guest with no AER driver should have been killed\n");
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goto release;
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goto end;
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}
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result = common_process(psdev, 1, XEN_PCI_OP_aer_slotreset, result);
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@ -698,9 +698,9 @@ static pci_ers_result_t xen_pcibk_slot_reset(struct pci_dev *dev)
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"No AER slot_reset service or disconnected!\n");
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kill_domain_by_device(psdev);
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}
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release:
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pcistub_device_put(psdev);
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end:
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if (psdev)
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pcistub_device_put(psdev);
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up_write(&pcistub_sem);
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return result;
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@ -739,14 +739,14 @@ static pci_ers_result_t xen_pcibk_mmio_enabled(struct pci_dev *dev)
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dev_err(&dev->dev, DRV_NAME " device is not connected or owned"
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" by HVM, kill it\n");
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kill_domain_by_device(psdev);
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goto release;
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goto end;
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}
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if (!test_bit(_XEN_PCIB_AERHANDLER,
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(unsigned long *)&psdev->pdev->sh_info->flags)) {
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dev_err(&dev->dev,
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"guest with no AER driver should have been killed\n");
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goto release;
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goto end;
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}
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result = common_process(psdev, 1, XEN_PCI_OP_aer_mmio, result);
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@ -756,9 +756,9 @@ static pci_ers_result_t xen_pcibk_mmio_enabled(struct pci_dev *dev)
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"No AER mmio_enabled service or disconnected!\n");
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kill_domain_by_device(psdev);
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}
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release:
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pcistub_device_put(psdev);
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end:
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if (psdev)
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pcistub_device_put(psdev);
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up_write(&pcistub_sem);
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return result;
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}
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@ -797,7 +797,7 @@ static pci_ers_result_t xen_pcibk_error_detected(struct pci_dev *dev,
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dev_err(&dev->dev, DRV_NAME " device is not connected or owned"
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" by HVM, kill it\n");
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kill_domain_by_device(psdev);
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goto release;
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goto end;
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}
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/*Guest owns the device yet no aer handler regiested, kill guest*/
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@ -805,7 +805,7 @@ static pci_ers_result_t xen_pcibk_error_detected(struct pci_dev *dev,
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(unsigned long *)&psdev->pdev->sh_info->flags)) {
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dev_dbg(&dev->dev, "guest may have no aer driver, kill it\n");
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kill_domain_by_device(psdev);
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goto release;
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goto end;
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}
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result = common_process(psdev, error, XEN_PCI_OP_aer_detected, result);
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@ -815,9 +815,9 @@ static pci_ers_result_t xen_pcibk_error_detected(struct pci_dev *dev,
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"No AER error_detected service or disconnected!\n");
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kill_domain_by_device(psdev);
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}
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release:
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pcistub_device_put(psdev);
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end:
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if (psdev)
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pcistub_device_put(psdev);
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up_write(&pcistub_sem);
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return result;
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}
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@ -851,7 +851,7 @@ static void xen_pcibk_error_resume(struct pci_dev *dev)
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dev_err(&dev->dev, DRV_NAME " device is not connected or owned"
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" by HVM, kill it\n");
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kill_domain_by_device(psdev);
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goto release;
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goto end;
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}
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if (!test_bit(_XEN_PCIB_AERHANDLER,
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@ -859,13 +859,13 @@ static void xen_pcibk_error_resume(struct pci_dev *dev)
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dev_err(&dev->dev,
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"guest with no AER driver should have been killed\n");
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kill_domain_by_device(psdev);
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goto release;
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goto end;
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}
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common_process(psdev, 1, XEN_PCI_OP_aer_resume,
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PCI_ERS_RESULT_RECOVERED);
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release:
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pcistub_device_put(psdev);
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end:
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if (psdev)
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pcistub_device_put(psdev);
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up_write(&pcistub_sem);
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return;
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}
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@ -1024,7 +1024,7 @@ static int pcistub_reg_add(int domain, int bus, int slot, int func, int reg,
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struct config_field *field;
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psdev = pcistub_device_find(domain, bus, slot, func);
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if (!psdev || !psdev->dev) {
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if (!psdev) {
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err = -ENODEV;
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goto out;
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}
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@ -1048,6 +1048,8 @@ static int pcistub_reg_add(int domain, int bus, int slot, int func, int reg,
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if (err)
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kfree(field);
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out:
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if (psdev)
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pcistub_device_put(psdev);
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return err;
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}
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@ -1152,10 +1154,9 @@ static ssize_t pcistub_irq_handler_switch(struct device_driver *drv,
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err = str_to_slot(buf, &domain, &bus, &slot, &func);
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if (err)
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goto out;
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return err;
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psdev = pcistub_device_find(domain, bus, slot, func);
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if (!psdev)
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goto out;
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@ -1171,6 +1172,8 @@ static ssize_t pcistub_irq_handler_switch(struct device_driver *drv,
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if (dev_data->isr_on)
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dev_data->ack_intr = 1;
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out:
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if (psdev)
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pcistub_device_put(psdev);
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if (!err)
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err = count;
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return err;
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@ -1262,10 +1265,7 @@ static ssize_t permissive_add(struct device_driver *drv, const char *buf,
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err = -ENODEV;
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goto out;
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}
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if (!psdev->dev) {
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err = -ENODEV;
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goto release;
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}
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dev_data = pci_get_drvdata(psdev->dev);
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/* the driver data for a device should never be null at this point */
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if (!dev_data) {
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