The patch titled
mmc: add Extended CSD register to debugfs
has been removed from the -mm tree. Its filename was
mmc-add-extended-csd-register-to-debugfs.patch
This patch was dropped because it was merged into mainline or a subsystem tree
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: mmc: add Extended CSD register to debugfs
From: Adrian Hunter <ext-adrian.hunter@xxxxxxxxx>
Extended CSD is a MMC card register. As increasingly interesting fields
are being added to Extended CSD, it is helpful to see its value. Note
that SD cards do not have an Extended CSD register, so it is MMC only.
[akpm@xxxxxxxxxxxxxxxxxxxx: coding-style fixes]
Signed-off-by: Adrian Hunter <ext-adrian.hunter@xxxxxxxxx>
Cc: Pierre Ossman <drzeus-mmc@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/mmc/core/debugfs.c | 67 +++++++++++++++++++++++++++++++++++
1 file changed, 67 insertions(+)
diff -puN drivers/mmc/core/debugfs.c~mmc-add-extended-csd-register-to-debugfs drivers/mmc/core/debugfs.c
--- a/drivers/mmc/core/debugfs.c~mmc-add-extended-csd-register-to-debugfs
+++ a/drivers/mmc/core/debugfs.c
@@ -246,6 +246,68 @@ static struct file_operations mmc_dbg_ex
.release = mmc_ext_csd_release,
};
+#define EXT_CSD_STR_LEN 1025
+
+static int mmc_ext_csd_open(struct inode *inode, struct file *filp)
+{
+ struct mmc_card *card = inode->i_private;
+ char *buf;
+ ssize_t n = 0;
+ u8 *ext_csd;
+ int err, i;
+
+ buf = kmalloc(EXT_CSD_STR_LEN + 1, GFP_KERNEL);
+ if (!buf)
+ return -ENOMEM;
+
+ ext_csd = kmalloc(512, GFP_KERNEL);
+ if (!ext_csd) {
+ err = -ENOMEM;
+ goto out_free;
+ }
+
+ mmc_claim_host(card->host);
+ err = mmc_send_ext_csd(card, ext_csd);
+ mmc_release_host(card->host);
+ if (err)
+ goto out_free;
+
+ for (i = 511; i >= 0; i--)
+ n += sprintf(buf + n, "%02x", ext_csd[i]);
+ n += sprintf(buf + n, "\n");
+ BUG_ON(n != EXT_CSD_STR_LEN);
+
+ filp->private_data = buf;
+ kfree(ext_csd);
+ return 0;
+
+out_free:
+ kfree(buf);
+ kfree(ext_csd);
+ return err;
+}
+
+static ssize_t mmc_ext_csd_read(struct file *filp, char __user *ubuf,
+ size_t cnt, loff_t *ppos)
+{
+ char *buf = filp->private_data;
+
+ return simple_read_from_buffer(ubuf, cnt, ppos,
+ buf, EXT_CSD_STR_LEN);
+}
+
+static int mmc_ext_csd_release(struct inode *inode, struct file *file)
+{
+ kfree(file->private_data);
+ return 0;
+}
+
+static const struct file_operations mmc_dbg_ext_csd_fops = {
+ .open = mmc_ext_csd_open,
+ .read = mmc_ext_csd_read,
+ .release = mmc_ext_csd_release,
+};
+
void mmc_add_card_debugfs(struct mmc_card *card)
{
struct mmc_host *host = card->host;
@@ -278,6 +340,11 @@ void mmc_add_card_debugfs(struct mmc_car
&mmc_dbg_ext_csd_fops))
goto err;
+ if (mmc_card_mmc(card))
+ if (!debugfs_create_file("ext_csd", S_IRUSR, root, card,
+ &mmc_dbg_ext_csd_fops))
+ goto err;
+
return;
err:
_
Patches currently in -mm which might be from ext-adrian.hunter@xxxxxxxxx are
fs-new-inode-i_state-corruption-fix.patch
linux-next.patch
mmc-add-extended-csd-register-to-debugfs.patch
mtd-onenand-add-write-while-program-support.patch
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