From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 21F6E182C8 for ; Tue, 25 Jul 2023 11:27:25 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 9A876C433C9; Tue, 25 Jul 2023 11:27:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1690284445; bh=pYK34eFpQlDsKKEA1dn8XkahryVLN0N2tQFR7XdfYIQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=au764wv+/AzD//WZfr8pA0Tv5r2nA7eIgKBMl4hGqQVxfJeq5hHu06Xo41u8DpjzV mktVA82Azr8PG6wZYl+ZoOow3nZtsij2iGxIiZaPvTFGYWfX/twfd3Vm1MaKeuoKxp NDSPzov1Wb+A/4RczJKj66c/OcbqG7gxMhhIB3Pc= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, =?UTF-8?q?Barnab=C3=A1s=20P=C5=91cze?= , Hans de Goede , Sasha Levin Subject: [PATCH 5.10 359/509] platform/x86: wmi: use guid_t and guid_equal() Date: Tue, 25 Jul 2023 12:44:58 +0200 Message-ID: <20230725104610.166413510@linuxfoundation.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230725104553.588743331@linuxfoundation.org> References: <20230725104553.588743331@linuxfoundation.org> User-Agent: quilt/0.67 Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Barnabás Pőcze [ Upstream commit 67f472fdacf4a691b1c3c20c27800b23ce31e2de ] Instead of hard-coding a 16 long byte array, use the available `guid_t` type and related methods. Signed-off-by: Barnabás Pőcze Link: https://lore.kernel.org/r/20210904175450.156801-15-pobrn@protonmail.com Reviewed-by: Hans de Goede Signed-off-by: Hans de Goede Stable-dep-of: 028e6e204ace ("platform/x86: wmi: Break possible infinite loop when parsing GUID") Signed-off-by: Sasha Levin --- drivers/platform/x86/wmi.c | 34 +++++++++++++++++----------------- 1 file changed, 17 insertions(+), 17 deletions(-) diff --git a/drivers/platform/x86/wmi.c b/drivers/platform/x86/wmi.c index 9a6dc2717e1d4..18c4080d4a71e 100644 --- a/drivers/platform/x86/wmi.c +++ b/drivers/platform/x86/wmi.c @@ -40,7 +40,7 @@ MODULE_LICENSE("GPL"); static LIST_HEAD(wmi_block_list); struct guid_block { - char guid[16]; + guid_t guid; union { char object_id[2]; struct { @@ -121,7 +121,7 @@ static bool find_guid(const char *guid_string, struct wmi_block **out) list_for_each_entry(wblock, &wmi_block_list, list) { block = &wblock->gblock; - if (memcmp(block->guid, &guid_input, 16) == 0) { + if (guid_equal(&block->guid, &guid_input)) { if (out) *out = wblock; return true; @@ -145,7 +145,7 @@ static const void *find_guid_context(struct wmi_block *wblock, while (*id->guid_string) { if (guid_parse(id->guid_string, &guid_input)) continue; - if (!memcmp(wblock->gblock.guid, &guid_input, 16)) + if (guid_equal(&wblock->gblock.guid, &guid_input)) return id->context; id++; } @@ -457,7 +457,7 @@ EXPORT_SYMBOL_GPL(wmi_set_block); static void wmi_dump_wdg(const struct guid_block *g) { - pr_info("%pUL:\n", g->guid); + pr_info("%pUL:\n", &g->guid); if (g->flags & ACPI_WMI_EVENT) pr_info("\tnotify_id: 0x%02X\n", g->notify_id); else @@ -539,7 +539,7 @@ wmi_notify_handler handler, void *data) list_for_each_entry(block, &wmi_block_list, list) { acpi_status wmi_status; - if (memcmp(block->gblock.guid, &guid_input, 16) == 0) { + if (guid_equal(&block->gblock.guid, &guid_input)) { if (block->handler && block->handler != wmi_notify_debug) return AE_ALREADY_ACQUIRED; @@ -579,7 +579,7 @@ acpi_status wmi_remove_notify_handler(const char *guid) list_for_each_entry(block, &wmi_block_list, list) { acpi_status wmi_status; - if (memcmp(block->gblock.guid, &guid_input, 16) == 0) { + if (guid_equal(&block->gblock.guid, &guid_input)) { if (!block->handler || block->handler == wmi_notify_debug) return AE_NULL_ENTRY; @@ -685,7 +685,7 @@ static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, { struct wmi_block *wblock = dev_to_wblock(dev); - return sprintf(buf, "wmi:%pUL\n", wblock->gblock.guid); + return sprintf(buf, "wmi:%pUL\n", &wblock->gblock.guid); } static DEVICE_ATTR_RO(modalias); @@ -694,7 +694,7 @@ static ssize_t guid_show(struct device *dev, struct device_attribute *attr, { struct wmi_block *wblock = dev_to_wblock(dev); - return sprintf(buf, "%pUL\n", wblock->gblock.guid); + return sprintf(buf, "%pUL\n", &wblock->gblock.guid); } static DEVICE_ATTR_RO(guid); @@ -777,10 +777,10 @@ static int wmi_dev_uevent(struct device *dev, struct kobj_uevent_env *env) { struct wmi_block *wblock = dev_to_wblock(dev); - if (add_uevent_var(env, "MODALIAS=wmi:%pUL", wblock->gblock.guid)) + if (add_uevent_var(env, "MODALIAS=wmi:%pUL", &wblock->gblock.guid)) return -ENOMEM; - if (add_uevent_var(env, "WMI_GUID=%pUL", wblock->gblock.guid)) + if (add_uevent_var(env, "WMI_GUID=%pUL", &wblock->gblock.guid)) return -ENOMEM; return 0; @@ -808,7 +808,7 @@ static int wmi_dev_match(struct device *dev, struct device_driver *driver) if (WARN_ON(guid_parse(id->guid_string, &driver_guid))) continue; - if (!memcmp(&driver_guid, wblock->gblock.guid, 16)) + if (guid_equal(&driver_guid, &wblock->gblock.guid)) return 1; id++; @@ -1104,7 +1104,7 @@ static int wmi_create_device(struct device *wmi_bus_dev, wblock->dev.dev.bus = &wmi_bus_type; wblock->dev.dev.parent = wmi_bus_dev; - dev_set_name(&wblock->dev.dev, "%pUL", wblock->gblock.guid); + dev_set_name(&wblock->dev.dev, "%pUL", &wblock->gblock.guid); device_initialize(&wblock->dev.dev); @@ -1124,12 +1124,12 @@ static void wmi_free_devices(struct acpi_device *device) } } -static bool guid_already_parsed(struct acpi_device *device, const u8 *guid) +static bool guid_already_parsed(struct acpi_device *device, const guid_t *guid) { struct wmi_block *wblock; list_for_each_entry(wblock, &wmi_block_list, list) { - if (memcmp(wblock->gblock.guid, guid, 16) == 0) { + if (guid_equal(&wblock->gblock.guid, guid)) { /* * Because we historically didn't track the relationship * between GUIDs and ACPI nodes, we don't know whether @@ -1184,7 +1184,7 @@ static int parse_wdg(struct device *wmi_bus_dev, struct acpi_device *device) * case yet, so for now, we'll just ignore the duplicate * for device creation. */ - if (guid_already_parsed(device, gblock[i].guid)) + if (guid_already_parsed(device, &gblock[i].guid)) continue; wblock = kzalloc(sizeof(struct wmi_block), GFP_KERNEL); @@ -1221,7 +1221,7 @@ static int parse_wdg(struct device *wmi_bus_dev, struct acpi_device *device) retval = device_add(&wblock->dev.dev); if (retval) { dev_err(wmi_bus_dev, "failed to register %pUL\n", - wblock->gblock.guid); + &wblock->gblock.guid); if (debug_event) wmi_method_enable(wblock, 0); list_del(&wblock->list); @@ -1335,7 +1335,7 @@ static void acpi_wmi_notify_handler(acpi_handle handle, u32 event, } if (debug_event) - pr_info("DEBUG Event GUID: %pUL\n", wblock->gblock.guid); + pr_info("DEBUG Event GUID: %pUL\n", &wblock->gblock.guid); acpi_bus_generate_netlink_event( wblock->acpi_device->pnp.device_class, -- 2.39.2