If an EEH or some other hard error occurs while the
adapter instance was being initialized, on the subsequent
shutdown of the device, the system could crash with:
[c000000f1da03b60] c0000000005eccfc pci_device_shutdown+0x6c/0x100
[c000000f1da03ba0] c0000000006d67d4 device_shutdown+0x1b4/0x2c0
[c000000f1da03c40] c0000000000ea30c kernel_restart_prepare+0x5c/0x80
[c000000f1da03c70] c0000000000ea48c kernel_restart+0x2c/0xc0
[c000000f1da03ce0] c0000000000ea970 SyS_reboot+0x1c0/0x2d0
[c000000f1da03e30] c000000000009204 system_call+0x38/0xb4
This crash is due to the AFU not being mapped when the shutdown
notification routine is called and is a regression that was inserted
recently with Commit 704c4b0ddc03 ("cxlflash: Shutdown notify support
for CXL Flash cards").
As a fix, shutdown notification should only occur when the AFU is mapped.
Fixes: 704c4b0ddc03 ("cxlflash: Shutdown notify support for CXL Flash cards")
Signed-off-by: Uma Krishnan <ukrishn@xxxxxxxxxxxxxxxxxx>
---
drivers/scsi/cxlflash/main.c | 10 +++++++++-
1 file changed, 9 insertions(+), 1 deletion(-)
diff --git a/drivers/scsi/cxlflash/main.c b/drivers/scsi/cxlflash/main.c
index 860008d..661bb94 100644
--- a/drivers/scsi/cxlflash/main.c
+++ b/drivers/scsi/cxlflash/main.c
@@ -778,7 +778,7 @@ static void notify_shutdown(struct cxlflash_cfg *cfg, bool wait)
{
struct afu *afu = cfg->afu;
struct device *dev = &cfg->dev->dev;
- struct sisl_global_map __iomem *global = &afu->afu_map->global;
+ struct sisl_global_map __iomem *global;
struct dev_dependent_vals *ddv;
u64 reg, status;
int i, retry_cnt = 0;
@@ -787,6 +787,14 @@ static void notify_shutdown(struct cxlflash_cfg *cfg, bool wait)
if (!(ddv->flags & CXLFLASH_NOTIFY_SHUTDOWN))
return;
+ if (!afu || !afu->afu_map) {
+ dev_dbg(dev, "%s: The problem state area is not mapped\n",
+ __func__);
+ return;
+ }
+
+ global = &afu->afu_map->global;
+
/* Notify AFU */
for (i = 0; i < NUM_FC_PORTS; i++) {
reg = readq_be(&global->fc_regs[i][FC_CONFIG2 / 8]);
--
2.1.0
--
To unsubscribe from this list: send the line "unsubscribe linux-scsi" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
