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edac, highbank: Moving error injection to sysfs for edac 

Always have the error injection i/f available, even if there is no
debugfs or EDAC_DEBUG enabled. We need this for testing production
kernels and environments.

Thus, the entry moves from:

 /sys/kernel/debug/edac/mc0/inject_ctrl

to:

 /sys/devices/system/edac/mc/mc0/inject_ctrl

No other changes of the interface.

Signed-off-by: Robert Richter <robert.richter@linaro.org>
Signed-off-by: Robert Richter <rric@kernel.org>
This commit is contained in:
Robert Richter 2013-10-29 14:56:13 -07:00 committed by Robert Richter
parent 836dae5d00
commit 78cfbf0bbf
1 changed files with 20 additions and 35 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

49
drivers/edac/highbank_mc_edac.c
View File

@ -95,50 +95,34 @@ static irqreturn_t highbank_mc_err_handler(int irq, void *dev_id)
return IRQ_HANDLED;
}
#ifdef CONFIG_EDAC_DEBUG
static ssize_t highbank_mc_err_inject_write(struct file *file,
const char __user *data,
size_t count, loff_t *ppos)
static void highbank_mc_err_inject(struct mem_ctl_info *mci, u8 synd)
{
struct mem_ctl_info *mci = file->private_data;
struct hb_mc_drvdata *pdata = mci->pvt_info;
char buf[32];
size_t buf_size;
u32 reg;
u8 synd;
buf_size = min(count, (sizeof(buf)-1));
if (copy_from_user(buf, data, buf_size))
return -EFAULT;
buf[buf_size] = 0;
if (!kstrtou8(buf, 16, &synd)) {
reg = readl(pdata->mc_err_base + HB_DDR_ECC_OPT);
reg &= HB_DDR_ECC_OPT_MODE_MASK;
reg |= (synd << HB_DDR_ECC_OPT_XOR_SHIFT) | HB_DDR_ECC_OPT_FWC;
writel(reg, pdata->mc_err_base + HB_DDR_ECC_OPT);
}
#define to_mci(k) container_of(k, struct mem_ctl_info, dev)
static ssize_t highbank_mc_inject_ctrl(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count)
{
struct mem_ctl_info *mci = to_mci(dev);
u8 synd;
if (kstrtou8(buf, 16, &synd))
return -EINVAL;
highbank_mc_err_inject(mci, synd);
return count;
}
static const struct file_operations highbank_mc_debug_inject_fops = {
.open = simple_open,
.write = highbank_mc_err_inject_write,
.llseek = generic_file_llseek,
};
static void highbank_mc_create_debugfs_nodes(struct mem_ctl_info *mci)
{
if (mci->debugfs)
debugfs_create_file("inject_ctrl", S_IWUSR, mci->debugfs, mci,
&highbank_mc_debug_inject_fops);
;
}
#else
static void highbank_mc_create_debugfs_nodes(struct mem_ctl_info *mci)
{}
#endif
static DEVICE_ATTR(inject_ctrl, S_IWUSR, NULL, highbank_mc_inject_ctrl);
struct hb_mc_settings {
int err_offset;
@ -259,7 +243,7 @@ static int highbank_mc_probe(struct platform_device *pdev)
goto err2;
}
highbank_mc_create_debugfs_nodes(mci);
device_create_file(&mci->dev, &dev_attr_inject_ctrl);
devres_close_group(&pdev->dev, NULL);
return 0;
@ -275,6 +259,7 @@ static int highbank_mc_remove(struct platform_device *pdev)
{
struct mem_ctl_info *mci = platform_get_drvdata(pdev);
device_remove_file(&mci->dev, &dev_attr_inject_ctrl);
edac_mc_del_mc(&pdev->dev);
edac_mc_free(mci);
return 0;