Merge tag 'for-4.17/block-20180402' of git://git.kernel.dk/linux-block

Pull block layer updates from Jens Axboe:
 "It's a pretty quiet round this time, which is nice. This contains:

   - series from Bart, cleaning up the way we set/test/clear atomic
     queue flags.

   - series from Bart, fixing races between gendisk and queue
     registration and removal.

   - set of bcache fixes and improvements from various folks, by way of
     Michael Lyle.

   - set of lightnvm updates from Matias, most of it being the 1.2 to
     2.0 transition.

   - removal of unused DIO flags from Nikolay.

   - blk-mq/sbitmap memory ordering fixes from Omar.

   - divide-by-zero fix for BFQ from Paolo.

   - minor documentation patches from Randy.

   - timeout fix from Tejun.

   - Alpha "can't write a char atomically" fix from Mikulas.

   - set of NVMe fixes by way of Keith.

   - bsg and bsg-lib improvements from Christoph.

   - a few sed-opal fixes from Jonas.

   - cdrom check-disk-change deadlock fix from Maurizio.

   - various little fixes, comment fixes, etc from various folks"

* tag 'for-4.17/block-20180402' of git://git.kernel.dk/linux-block: (139 commits)
  blk-mq: Directly schedule q->timeout_work when aborting a request
  blktrace: fix comment in blktrace_api.h
  lightnvm: remove function name in strings
  lightnvm: pblk: remove some unnecessary NULL checks
  lightnvm: pblk: don't recover unwritten lines
  lightnvm: pblk: implement 2.0 support
  lightnvm: pblk: implement get log report chunk
  lightnvm: pblk: rename ppaf* to addrf*
  lightnvm: pblk: check for supported version
  lightnvm: implement get log report chunk helpers
  lightnvm: make address conversions depend on generic device
  lightnvm: add support for 2.0 address format
  lightnvm: normalize geometry nomenclature
  lightnvm: complete geo structure with maxoc*
  lightnvm: add shorten OCSSD version in geo
  lightnvm: add minor version to generic geometry
  lightnvm: simplify geometry structure
  lightnvm: pblk: refactor init/exit sequences
  lightnvm: Avoid validation of default op value
  lightnvm: centralize permission check for lightnvm ioctl
  ...

1 files changed, 27 insertions, 10 deletions

diff --git a/block/sed-opal.c b/block/sed-opal.c
index e4929eec547fc..945f4b8610e0c 100644
--- a/block/sed-opal.c
+++ b/block/sed-opal.c
@@ -554,15 +554,14 @@ static void add_token_u64(int *err, struct opal_dev *cmd, u64 number)
 
 	size_t len;
 	int msb;
-	u8 n;
 
 	if (!(number & ~TINY_ATOM_DATA_MASK)) {
 		add_token_u8(err, cmd, number);
 		return;
 	}
 
-	msb = fls(number);
-	len = DIV_ROUND_UP(msb, 4);
+	msb = fls64(number);
+	len = DIV_ROUND_UP(msb, 8);
 
 	if (cmd->pos >= IO_BUFFER_LENGTH - len - 1) {
 		pr_debug("Error adding u64: end of buffer.\n");
@@ -570,10 +569,8 @@ static void add_token_u64(int *err, struct opal_dev *cmd, u64 number)
 		return;
 	}
 	add_short_atom_header(cmd, false, false, len);
-	while (len--) {
-		n = number >> (len * 8);
-		add_token_u8(err, cmd, n);
-	}
+	while (len--)
+		add_token_u8(err, cmd, number >> (len * 8));
 }
 
 static void add_token_bytestring(int *err, struct opal_dev *cmd,
@@ -871,6 +868,9 @@ static int response_parse(const u8 *buf, size_t length,
 static size_t response_get_string(const struct parsed_resp *resp, int n,
 				  const char **store)
 {
+	u8 skip;
+	const struct opal_resp_tok *token;
+
 	*store = NULL;
 	if (!resp) {
 		pr_debug("Response is NULL\n");
@@ -883,13 +883,30 @@ static size_t response_get_string(const struct parsed_resp *resp, int n,
 		return 0;
 	}
 
-	if (resp->toks[n].type != OPAL_DTA_TOKENID_BYTESTRING) {
+	token = &resp->toks[n];
+	if (token->type != OPAL_DTA_TOKENID_BYTESTRING) {
 		pr_debug("Token is not a byte string!\n");
 		return 0;
 	}
 
-	*store = resp->toks[n].pos + 1;
-	return resp->toks[n].len - 1;
+	switch (token->width) {
+	case OPAL_WIDTH_TINY:
+	case OPAL_WIDTH_SHORT:
+		skip = 1;
+		break;
+	case OPAL_WIDTH_MEDIUM:
+		skip = 2;
+		break;
+	case OPAL_WIDTH_LONG:
+		skip = 4;
+		break;
+	default:
+		pr_debug("Token has invalid width!\n");
+		return 0;
+	}
+
+	*store = token->pos + skip;
+	return token->len - skip;
 }
 
 static u64 response_get_u64(const struct parsed_resp *resp, int n)