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Wysocki" Cc: Alexander Stein , linux-kernel@vger.kernel.org Subject: [PATCH 1/2] regmap: cache: Do not panic for REGCACHE_NONE regmap Date: Fri, 10 Mar 2023 08:39:10 +0100 Message-Id: <20230310073911.3470892-1-alexander.stein@ew.tq-group.com> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 X-Spam-Status: No, score=-2.0 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_EF,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1759966154037914904?= X-GMAIL-MSGID: =?utf-8?q?1759966154037914904?= Most regcache operations do check for REGCACHE_NONE, before ensuring doing BUG_ON(!map->cache_ops). The missing regcache_sync* functions panic on REGCACHE_NONE regmaps instead. Add an early return for non-cached ones. Signed-off-by: Alexander Stein --- drivers/base/regmap/regcache.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/base/regmap/regcache.c b/drivers/base/regmap/regcache.c index 362e043e26d8..b61763dbfc68 100644 --- a/drivers/base/regmap/regcache.c +++ b/drivers/base/regmap/regcache.c @@ -349,6 +349,9 @@ int regcache_sync(struct regmap *map) const char *name; bool bypass; + if (map->cache_type == REGCACHE_NONE) + return 0; + BUG_ON(!map->cache_ops); map->lock(map->lock_arg); @@ -418,6 +421,9 @@ int regcache_sync_region(struct regmap *map, unsigned int min, const char *name; bool bypass; + if (map->cache_type == REGCACHE_NONE) + return 0; + BUG_ON(!map->cache_ops); map->lock(map->lock_arg);