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authorBrett Creeley <brett.creeley@amd.com>2024-01-29 15:40:30 -0800
committerJakub Kicinski <kuba@kernel.org>2024-01-31 18:26:58 -0800
commitd9407ff11809c6812bb84fe7be9c1367d758e5c8 (patch)
treeb9937696e57a13ef7d2352dc2ef649e261af6bb6 /drivers/net/ethernet
parent4d322dce82a1d44f8c83f0f54f95dd1b8dcf46c9 (diff)
downloadlwn-d9407ff11809c6812bb84fe7be9c1367d758e5c8.tar.gz
lwn-d9407ff11809c6812bb84fe7be9c1367d758e5c8.zip
pds_core: Prevent health thread from running during reset/remove
The PCIe reset handlers can run at the same time as the health thread. This can cause the health thread to stomp on the PCIe reset. Fix this by preventing the health thread from running while a PCIe reset is happening. As part of this use timer_shutdown_sync() during reset and remove to make sure the timer doesn't ever get rearmed. Fixes: ffa55858330f ("pds_core: implement pci reset handlers") Signed-off-by: Brett Creeley <brett.creeley@amd.com> Reviewed-by: Shannon Nelson <shannon.nelson@amd.com> Reviewed-by: Przemek Kitszel <przemyslaw.kitszel@intel.com> Link: https://lore.kernel.org/r/20240129234035.69802-2-brett.creeley@amd.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'drivers/net/ethernet')
-rw-r--r--drivers/net/ethernet/amd/pds_core/main.c19
1 files changed, 17 insertions, 2 deletions
diff --git a/drivers/net/ethernet/amd/pds_core/main.c b/drivers/net/ethernet/amd/pds_core/main.c
index 3080898d7b95..5172a5ad8ec6 100644
--- a/drivers/net/ethernet/amd/pds_core/main.c
+++ b/drivers/net/ethernet/amd/pds_core/main.c
@@ -293,7 +293,7 @@ err_out_stop:
err_out_teardown:
pdsc_teardown(pdsc, PDSC_TEARDOWN_REMOVING);
err_out_unmap_bars:
- del_timer_sync(&pdsc->wdtimer);
+ timer_shutdown_sync(&pdsc->wdtimer);
if (pdsc->wq)
destroy_workqueue(pdsc->wq);
mutex_destroy(&pdsc->config_lock);
@@ -420,7 +420,7 @@ static void pdsc_remove(struct pci_dev *pdev)
*/
pdsc_sriov_configure(pdev, 0);
- del_timer_sync(&pdsc->wdtimer);
+ timer_shutdown_sync(&pdsc->wdtimer);
if (pdsc->wq)
destroy_workqueue(pdsc->wq);
@@ -445,10 +445,24 @@ static void pdsc_remove(struct pci_dev *pdev)
devlink_free(dl);
}
+static void pdsc_stop_health_thread(struct pdsc *pdsc)
+{
+ timer_shutdown_sync(&pdsc->wdtimer);
+ if (pdsc->health_work.func)
+ cancel_work_sync(&pdsc->health_work);
+}
+
+static void pdsc_restart_health_thread(struct pdsc *pdsc)
+{
+ timer_setup(&pdsc->wdtimer, pdsc_wdtimer_cb, 0);
+ mod_timer(&pdsc->wdtimer, jiffies + 1);
+}
+
void pdsc_reset_prepare(struct pci_dev *pdev)
{
struct pdsc *pdsc = pci_get_drvdata(pdev);
+ pdsc_stop_health_thread(pdsc);
pdsc_fw_down(pdsc);
pci_free_irq_vectors(pdev);
@@ -486,6 +500,7 @@ void pdsc_reset_done(struct pci_dev *pdev)
}
pdsc_fw_up(pdsc);
+ pdsc_restart_health_thread(pdsc);
}
static const struct pci_error_handlers pdsc_err_handler = {