[PATCH v4 07/16] block: sed-opal: reuse response_get_token to decrease code duplication
From: David Kozub <hidden>
Date: 2019-02-01 20:51:42
Also in:
lkml
Subsystem:
block layer, secure encrypting device (sed) opal driver, the rest · Maintainers:
Jens Axboe, Jonathan Derrick, Linus Torvalds
response_get_token had already been in place, its functionality had
been duplicated within response_get_{u64,bytestring} with the same error
handling. Unify the handling by reusing response_get_token within the
other functions.
Co-authored-by: Jonas Rabenstein [off-list ref]
Signed-off-by: David Kozub <redacted>
Signed-off-by: Jonas Rabenstein <redacted>
Reviewed-by: Scott Bauer <redacted>
---
block/sed-opal.c | 46 +++++++++++++++-------------------------------
1 file changed, 15 insertions(+), 31 deletions(-)
diff --git a/block/sed-opal.c b/block/sed-opal.c
index 537cd73ea88a..1332547e5a99 100644
--- a/block/sed-opal.c
+++ b/block/sed-opal.c@@ -889,27 +889,19 @@ static size_t response_get_string(const struct parsed_resp *resp, int n, const char **store) { u8 skip; - const struct opal_resp_tok *token; + const struct opal_resp_tok *tok; *store = NULL; - if (!resp) { - pr_debug("Response is NULL\n"); - return 0; - } - - if (n >= resp->num) { - pr_debug("Response has %d tokens. Can't access %d\n", - resp->num, n); + tok = response_get_token(resp, n); + if (IS_ERR(tok)) return 0; - } - token = &resp->toks[n]; - if (token->type != OPAL_DTA_TOKENID_BYTESTRING) { + if (tok->type != OPAL_DTA_TOKENID_BYTESTRING) { pr_debug("Token is not a byte string!\n"); return 0; } - switch (token->width) { + switch (tok->width) { case OPAL_WIDTH_TINY: case OPAL_WIDTH_SHORT: skip = 1;
@@ -925,37 +917,29 @@ static size_t response_get_string(const struct parsed_resp *resp, int n, return 0; } - *store = token->pos + skip; - return token->len - skip; + *store = tok->pos + skip; + return tok->len - skip; } static u64 response_get_u64(const struct parsed_resp *resp, int n) { - if (!resp) { - pr_debug("Response is NULL\n"); - return 0; - } + const struct opal_resp_tok *tok; - if (n >= resp->num) { - pr_debug("Response has %d tokens. Can't access %d\n", - resp->num, n); + tok = response_get_token(resp, n); + if (IS_ERR(tok)) return 0; - } - if (resp->toks[n].type != OPAL_DTA_TOKENID_UINT) { - pr_debug("Token is not unsigned it: %d\n", - resp->toks[n].type); + if (tok->type != OPAL_DTA_TOKENID_UINT) { + pr_debug("Token is not unsigned int: %d\n", tok->type); return 0; } - if (!(resp->toks[n].width == OPAL_WIDTH_TINY || - resp->toks[n].width == OPAL_WIDTH_SHORT)) { - pr_debug("Atom is not short or tiny: %d\n", - resp->toks[n].width); + if (tok->width != OPAL_WIDTH_TINY && tok->width != OPAL_WIDTH_SHORT) { + pr_debug("Atom is not short or tiny: %d\n", tok->width); return 0; } - return resp->toks[n].stored.u; + return tok->stored.u; } static bool response_token_matches(const struct opal_resp_tok *token, u8 match)
--
2.20.1