Hi
On 2017/2/16 1:33, Heiner Kallweit wrote:
Am 15.02.2017 um 08:04 schrieb Shawn Lin:
Hi Heiner,
On 2017/2/15 4:53, Heiner Kallweit wrote:
Now that the new lifetime parameters are available in struct mmc_ext_csd
we can use this information to warn the user if card is close to or
beyond end of its lifetime.
This is really the user end argument that they could get it either from
sysfs or whether user-space tools. I don't believe the user would look
into the log but I assume you just add this for developers...
Indeed it's something userspace tools should take care of.
However I'm not aware of any standard tools doing this (especially on
non-production systems), so I thought such a sysylog warning would be
a good idea.
Usually we use mmc-utils and you could upstream your command to get
cards'lifetime there.
git://git.kernel.org/pub/scm/linux/kernel/git/cjb/mmc-utils.git
But of course there might be other opinions on that.
Signed-off-by: Heiner Kallweit <hkallweit1@xxxxxxxxx>
---
drivers/mmc/core/bus.c | 16 ++++++++++++++++
1 file changed, 16 insertions(+)
diff --git a/drivers/mmc/core/bus.c b/drivers/mmc/core/bus.c
index 30124651..ab20d242 100644
--- a/drivers/mmc/core/bus.c
+++ b/drivers/mmc/core/bus.c
@@ -345,6 +345,22 @@ int mmc_add_card(struct mmc_card *card)
uhs_bus_speed_mode, type, card->rca);
}
+ if (card->ext_csd.device_life_time_est_typ_a == 0xb ||
+ card->ext_csd.device_life_time_est_typ_b == 0xb)
+ pr_err("%s: memory has exceeded its life time",
+ mmc_hostname(card->host));
+ else if (card->ext_csd.device_life_time_est_typ_a == 0xa ||
+ card->ext_csd.device_life_time_est_typ_b == 0xa)
+ pr_warn("%s: memory has used more than 90%% of its life time\n",
+ mmc_hostname(card->host));
+
+ if (card->ext_csd.pre_eol_info == 3)
+ pr_err("%s: out of reserved blocks\n",
+ mmc_hostname(card->host));
+ else if (card->ext_csd.pre_eol_info == 2)
+ pr_warn("%s: more than 80%% of reserved blocks consumed\n",
+ mmc_hostname(card->host));
+
#ifdef CONFIG_DEBUG_FS
mmc_add_card_debugfs(card);
#endif
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