aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/pci
diff options
context:
space:
mode:
authorJohn Keeping <john@metanate.com>2017-09-20 13:56:06 -0500
committerBjorn Helgaas <bhelgaas@google.com>2017-09-20 13:56:06 -0500
commit749aaf3372b8b56b8743c3e27700d64c8bd06921 (patch)
tree11434013812a24f21ab8df0b6c071879c8d8d739 /drivers/pci
parent19a8d6b7604df85402deecae01d7861cb1d40c89 (diff)
PCI: endpoint: Use correct "end of test" interrupt
pci_epf_test_raise_irq() reads the interrupt to use for the response from reg->command, but this has been cleared at the beginning of the command handler so the value is always zero at this point. Instead, extract the interrupt index before handling the command and then pass the requested interrupt into pci_epf_test_raise_irq(). This allows us to remove the specific code to extract the interrupt for COMMAND_RAISE_MSI_IRQ since it is now handled in common code. Fixes: 3ecf3232c54c ("PCI: endpoint: Do not reset *command* inadvertently") Signed-off-by: John Keeping <john@metanate.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Acked-by: Kishon Vijay Abraham I <kishon@ti.com>
Diffstat (limited to 'drivers/pci')
-rw-r--r--drivers/pci/endpoint/functions/pci-epf-test.c13
1 files changed, 6 insertions, 7 deletions
diff --git a/drivers/pci/endpoint/functions/pci-epf-test.c b/drivers/pci/endpoint/functions/pci-epf-test.c
index 4ddc6e8f9fe7..f9308c2f22e6 100644
--- a/drivers/pci/endpoint/functions/pci-epf-test.c
+++ b/drivers/pci/endpoint/functions/pci-epf-test.c
@@ -251,9 +251,8 @@ err:
return ret;
}
-static void pci_epf_test_raise_irq(struct pci_epf_test *epf_test)
+static void pci_epf_test_raise_irq(struct pci_epf_test *epf_test, u8 irq)
{
- u8 irq;
u8 msi_count;
struct pci_epf *epf = epf_test->epf;
struct pci_epc *epc = epf->epc;
@@ -262,7 +261,6 @@ static void pci_epf_test_raise_irq(struct pci_epf_test *epf_test)
reg->status |= STATUS_IRQ_RAISED;
msi_count = pci_epc_get_msi(epc);
- irq = (reg->command & MSI_NUMBER_MASK) >> MSI_NUMBER_SHIFT;
if (irq > msi_count || msi_count <= 0)
pci_epc_raise_irq(epc, PCI_EPC_IRQ_LEGACY, 0);
else
@@ -289,6 +287,8 @@ static void pci_epf_test_cmd_handler(struct work_struct *work)
reg->command = 0;
reg->status = 0;
+ irq = (command & MSI_NUMBER_MASK) >> MSI_NUMBER_SHIFT;
+
if (command & COMMAND_RAISE_LEGACY_IRQ) {
reg->status = STATUS_IRQ_RAISED;
pci_epc_raise_irq(epc, PCI_EPC_IRQ_LEGACY, 0);
@@ -301,7 +301,7 @@ static void pci_epf_test_cmd_handler(struct work_struct *work)
reg->status |= STATUS_WRITE_FAIL;
else
reg->status |= STATUS_WRITE_SUCCESS;
- pci_epf_test_raise_irq(epf_test);
+ pci_epf_test_raise_irq(epf_test, irq);
goto reset_handler;
}
@@ -311,7 +311,7 @@ static void pci_epf_test_cmd_handler(struct work_struct *work)
reg->status |= STATUS_READ_SUCCESS;
else
reg->status |= STATUS_READ_FAIL;
- pci_epf_test_raise_irq(epf_test);
+ pci_epf_test_raise_irq(epf_test, irq);
goto reset_handler;
}
@@ -321,13 +321,12 @@ static void pci_epf_test_cmd_handler(struct work_struct *work)
reg->status |= STATUS_COPY_SUCCESS;
else
reg->status |= STATUS_COPY_FAIL;
- pci_epf_test_raise_irq(epf_test);
+ pci_epf_test_raise_irq(epf_test, irq);
goto reset_handler;
}
if (command & COMMAND_RAISE_MSI_IRQ) {
msi_count = pci_epc_get_msi(epc);
- irq = (command & MSI_NUMBER_MASK) >> MSI_NUMBER_SHIFT;
if (irq > msi_count || msi_count <= 0)
goto reset_handler;
reg->status = STATUS_IRQ_RAISED;

Privacy Policy