[PATCHv5 2/8] EDAC, altera: Add panic flag check to A10 IRQ
flat view
From: tthayer at opensource.altera.com <hidden>
Date: 2016-06-22 13:54:50
Also in:
linux-devicetree, lkml
Subsystem:
arm/socfpga edac support, edac-core, the rest · Maintainers:
Dinh Nguyen, Borislav Petkov, Tony Luck, Linus Torvalds
From: Thor Thayer <redacted> In preparation for additional memory module ECCs, the IRQ function will check a panic flag before doing a kernel panic on double bit errors. OCRAM uncorrectable errors cause a panic because sleep/resume functions and FPGA contents during sleep are stored in OCRAM. ECCs on peripheral FIFO buffers will not cause a kernel panic on DBERRs because the packet can be retried and therefore recovered. Signed-off-by: Thor Thayer <redacted> --- v2 New patch. Add panic flag to IRQ function. v3 No change v4 Add reasons to panic on DBERR in OCRAM. v5 No change --- drivers/edac/altera_edac.c | 9 ++++++++- drivers/edac/altera_edac.h | 1 + 2 files changed, 9 insertions(+), 1 deletion(-)
diff --git a/drivers/edac/altera_edac.c b/drivers/edac/altera_edac.c
index 0101dd0..75451bc 100644
--- a/drivers/edac/altera_edac.c
+++ b/drivers/edac/altera_edac.c@@ -897,7 +897,8 @@ static irqreturn_t altr_edac_a10_ecc_irq(int irq, void *dev_id) writel(ALTR_A10_ECC_DERRPENA, base + ALTR_A10_ECC_INTSTAT_OFST); edac_device_handle_ue(dci->edac_dev, 0, 0, dci->edac_dev_name); - panic("\nEDAC:ECC_DEVICE[Uncorrectable errors]\n"); + if (dci->data->panic) + panic("\nEDAC:ECC_DEVICE[Uncorrectable errors]\n"); return IRQ_HANDLED; }
@@ -936,6 +937,12 @@ const struct edac_device_prv_data a10_ocramecc_data = { .set_err_ofst = ALTR_A10_ECC_INTTEST_OFST, .ecc_irq_handler = altr_edac_a10_ecc_irq, .inject_fops = &altr_edac_a10_device_inject_fops, + /* + * OCRAM panic on uncorrectable error because sleep/resume + * functions and FPGA contents are stored in OCRAM. Prefer + * a kernel panic over executing/loading corrupted data. + */ + .panic = true, }; #endif /* CONFIG_EDAC_ALTERA_OCRAM */
diff --git a/drivers/edac/altera_edac.h b/drivers/edac/altera_edac.h
index 62b0fa0..cf4e8cb 100644
--- a/drivers/edac/altera_edac.h
+++ b/drivers/edac/altera_edac.h@@ -298,6 +298,7 @@ struct edac_device_prv_data { irqreturn_t (*ecc_irq_handler)(int irq, void *dev_id); int trig_alloc_sz; const struct file_operations *inject_fops; + bool panic; }; struct altr_edac_device_dev {
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1.7.9.5