| From ea62c7b1bf6a7fa765bddfc710a279e233ead67c Mon Sep 17 00:00:00 2001 |
| From: Thor Thayer <tthayer@opensource.altera.com> |
| Date: Wed, 19 Oct 2016 14:53:47 -0500 |
| Subject: [PATCH 070/103] EDAC, altera: Disable IRQs while injecting SDRAM |
| errors |
| |
| Disable IRQs while injecting SDRAM errors. The RT patches exposed |
| a spinlock deadlock where the spinlock taken for the regmap write |
| deadlocked with the IRQ clear regmap write. |
| |
| Error injection is not normally enabled for ECC but only for testing. |
| |
| Signed-off-by: Thor Thayer <tthayer@opensource.altera.com> |
| Cc: linux-edac <linux-edac@vger.kernel.org> |
| Link: http://lkml.kernel.org/r/1476906827-9412-1-git-send-email-tthayer@opensource.altera.com |
| Signed-off-by: Borislav Petkov <bp@suse.de> |
| --- |
| drivers/edac/altera_edac.c | 4 ++++ |
| 1 file changed, 4 insertions(+) |
| |
| --- a/drivers/edac/altera_edac.c |
| +++ b/drivers/edac/altera_edac.c |
| @@ -153,13 +153,17 @@ static ssize_t altr_sdr_mc_err_inject_wr |
| if (count == 3) { |
| edac_printk(KERN_ALERT, EDAC_MC, |
| "Inject Double bit error\n"); |
| + local_irq_disable(); |
| regmap_write(drvdata->mc_vbase, priv->ce_ue_trgr_offset, |
| (read_reg | priv->ue_set_mask)); |
| + local_irq_enable(); |
| } else { |
| edac_printk(KERN_ALERT, EDAC_MC, |
| "Inject Single bit error\n"); |
| + local_irq_disable(); |
| regmap_write(drvdata->mc_vbase, priv->ce_ue_trgr_offset, |
| (read_reg | priv->ce_set_mask)); |
| + local_irq_enable(); |
| } |
| |
| ptemp[0] = 0x5A5A5A5A; |