提交 90e493d7 编写于 作者: T Thor Thayer 提交者: Borislav Petkov

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: NThor 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.comSigned-off-by: NBorislav Petkov <bp@suse.de>
上级 240ea921
......@@ -153,13 +153,17 @@ static ssize_t altr_sdr_mc_err_inject_write(struct file *file,
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;
......
Markdown is supported
0% .
You are about to add 0 people to the discussion. Proceed with caution.
先完成此消息的编辑!
想要评论请 注册