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cxl: Factor out common dev->driver expressions

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Save the struct pci_driver and struct pci_error_handlers pointers from
pdev->driver instead of chasing the pointers several times.  No functional
change intended.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
This commit is contained in:
Bjorn Helgaas 2021-10-12 15:51:32 -05:00
parent 43e85554d4
commit 4e59b75430
2 changed files with 41 additions and 24 deletions
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30
drivers/misc/cxl/guest.c
View File

@ -20,34 +20,38 @@ static void pci_error_handlers(struct cxl_afu *afu,
pci_channel_state_t state)
{
struct pci_dev *afu_dev;
struct pci_driver *afu_drv;
const struct pci_error_handlers *err_handler;
if (afu->phb == NULL)
return;
list_for_each_entry(afu_dev, &afu->phb->bus->devices, bus_list) {
if (!afu_dev->driver)
afu_drv = afu_dev->driver;
if (!afu_drv)
continue;
err_handler = afu_drv->err_handler;
switch (bus_error_event) {
case CXL_ERROR_DETECTED_EVENT:
afu_dev->error_state = state;
if (afu_dev->driver->err_handler &&
afu_dev->driver->err_handler->error_detected)
afu_dev->driver->err_handler->error_detected(afu_dev, state);
break;
if (err_handler &&
err_handler->error_detected)
err_handler->error_detected(afu_dev, state);
break;
case CXL_SLOT_RESET_EVENT:
afu_dev->error_state = state;
if (afu_dev->driver->err_handler &&
afu_dev->driver->err_handler->slot_reset)
afu_dev->driver->err_handler->slot_reset(afu_dev);
break;
if (err_handler &&
err_handler->slot_reset)
err_handler->slot_reset(afu_dev);
break;
case CXL_RESUME_EVENT:
if (afu_dev->driver->err_handler &&
afu_dev->driver->err_handler->resume)
afu_dev->driver->err_handler->resume(afu_dev);
break;
if (err_handler &&
err_handler->resume)
err_handler->resume(afu_dev);
break;
}
}
}

35
drivers/misc/cxl/pci.c
View File

@ -1795,6 +1795,8 @@ static pci_ers_result_t cxl_vphb_error_detected(struct cxl_afu *afu,
pci_channel_state_t state)
{
struct pci_dev *afu_dev;
struct pci_driver *afu_drv;
const struct pci_error_handlers *err_handler;
pci_ers_result_t result = PCI_ERS_RESULT_NEED_RESET;
pci_ers_result_t afu_result = PCI_ERS_RESULT_NEED_RESET;
@ -1805,14 +1807,16 @@ static pci_ers_result_t cxl_vphb_error_detected(struct cxl_afu *afu,
return result;
list_for_each_entry(afu_dev, &afu->phb->bus->devices, bus_list) {
if (!afu_dev->driver)
afu_drv = afu_dev->driver;
if (!afu_drv)
continue;
afu_dev->error_state = state;
if (afu_dev->driver->err_handler)
afu_result = afu_dev->driver->err_handler->error_detected(afu_dev,
state);
err_handler = afu_drv->err_handler;
if (err_handler)
afu_result = err_handler->error_detected(afu_dev,
state);
/* Disconnect trumps all, NONE trumps NEED_RESET */
if (afu_result == PCI_ERS_RESULT_DISCONNECT)
result = PCI_ERS_RESULT_DISCONNECT;
@ -1972,6 +1976,8 @@ static pci_ers_result_t cxl_pci_slot_reset(struct pci_dev *pdev)
struct cxl_afu *afu;
struct cxl_context *ctx;
struct pci_dev *afu_dev;
struct pci_driver *afu_drv;
const struct pci_error_handlers *err_handler;
pci_ers_result_t afu_result = PCI_ERS_RESULT_RECOVERED;
pci_ers_result_t result = PCI_ERS_RESULT_RECOVERED;
int i;
@ -2028,12 +2034,13 @@ static pci_ers_result_t cxl_pci_slot_reset(struct pci_dev *pdev)
* shouldn't start new work until we call
* their resume function.
*/
if (!afu_dev->driver)
afu_drv = afu_dev->driver;
if (!afu_drv)
continue;
if (afu_dev->driver->err_handler &&
afu_dev->driver->err_handler->slot_reset)
afu_result = afu_dev->driver->err_handler->slot_reset(afu_dev);
err_handler = afu_drv->err_handler;
if (err_handler && err_handler->slot_reset)
afu_result = err_handler->slot_reset(afu_dev);
if (afu_result == PCI_ERS_RESULT_DISCONNECT)
result = PCI_ERS_RESULT_DISCONNECT;
@ -2060,6 +2067,8 @@ static void cxl_pci_resume(struct pci_dev *pdev)
struct cxl *adapter = pci_get_drvdata(pdev);
struct cxl_afu *afu;
struct pci_dev *afu_dev;
struct pci_driver *afu_drv;
const struct pci_error_handlers *err_handler;
int i;
/* Everything is back now. Drivers should restart work now.
@ -2074,9 +2083,13 @@ static void cxl_pci_resume(struct pci_dev *pdev)
continue;
list_for_each_entry(afu_dev, &afu->phb->bus->devices, bus_list) {
if (afu_dev->driver && afu_dev->driver->err_handler &&
afu_dev->driver->err_handler->resume)
afu_dev->driver->err_handler->resume(afu_dev);
afu_drv = afu_dev->driver;
if (!afu_drv)
continue;
err_handler = afu_drv->err_handler;
if (err_handler && err_handler->resume)
err_handler->resume(afu_dev);
}
}
spin_unlock(&adapter->afu_list_lock);