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From: Sui Jingfeng <sui.jingfeng@linux.dev>
To: Lucas Stach <l.stach@pengutronix.de>,
	Russell King <linux+etnaviv@armlinux.org.uk>,
	Christian Gmeiner <christian.gmeiner@gmail.com>,
	David Airlie <airlied@gmail.com>, Daniel Vetter <daniel@ffwll.ch>
Cc: etnaviv@lists.freedesktop.org, dri-devel@lists.freedesktop.org,
	linux-kernel@vger.kernel.org, loongson-kernel@lists.loongnix.cn,
	Sui Jingfeng <suijingfeng@loongson.cn>
Subject: [PATCH v1 1/8] drm/etnaviv: Using the size_t variable to store the number of pages
Date: Fri, 23 Jun 2023 18:08:15 +0800	[thread overview]
Message-ID: <20230623100822.274706-2-sui.jingfeng@linux.dev> (raw)
In-Reply-To: <20230623100822.274706-1-sui.jingfeng@linux.dev>

From: Sui Jingfeng <suijingfeng@loongson.cn>

Because the etnaviv_gem_new_private() function receives the size_t argument
for the number of pages. And the number of pages should be unsigned.

Note that Most 32-bit architectures use "unsigned int" size_t,
and all 64-bit architectures use "unsigned long" size_t.
So, let's keep the argument and parameter consistent.

Signed-off-by: Sui Jingfeng <suijingfeng@loongson.cn>
---
 drivers/gpu/drm/etnaviv/etnaviv_gem_prime.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/etnaviv/etnaviv_gem_prime.c b/drivers/gpu/drm/etnaviv/etnaviv_gem_prime.c
index 3524b5811682..b003481adc2b 100644
--- a/drivers/gpu/drm/etnaviv/etnaviv_gem_prime.c
+++ b/drivers/gpu/drm/etnaviv/etnaviv_gem_prime.c
@@ -114,7 +114,8 @@ struct drm_gem_object *etnaviv_gem_prime_import_sg_table(struct drm_device *dev,
 {
 	struct etnaviv_gem_object *etnaviv_obj;
 	size_t size = PAGE_ALIGN(attach->dmabuf->size);
-	int ret, npages;
+	size_t npages = size / PAGE_SIZE;
+	int ret;
 
 	ret = etnaviv_gem_new_private(dev, size, ETNA_BO_WC,
 				      &etnaviv_gem_prime_ops, &etnaviv_obj);
@@ -123,8 +124,6 @@ struct drm_gem_object *etnaviv_gem_prime_import_sg_table(struct drm_device *dev,
 
 	lockdep_set_class(&etnaviv_obj->lock, &etnaviv_prime_lock_class);
 
-	npages = size / PAGE_SIZE;
-
 	etnaviv_obj->sgt = sgt;
 	etnaviv_obj->pages = kvmalloc_array(npages, sizeof(struct page *), GFP_KERNEL);
 	if (!etnaviv_obj->pages) {
-- 
2.25.1


  reply	other threads:[~2023-06-23 10:17 UTC|newest]

Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-06-23 10:08 [PATCH v1 0/8] drm/etnaviv: Various cleanup Sui Jingfeng
2023-06-23 10:08 ` Sui Jingfeng [this message]
2023-07-17  9:43   ` [PATCH v1 1/8] drm/etnaviv: Using the size_t variable to store the number of pages Lucas Stach
2023-07-17 10:12     ` Sui Jingfeng
2023-07-17 10:38       ` Lucas Stach
2023-06-23 10:08 ` [PATCH v1 2/8] drm/etnaviv: Using the unsigned int type to count " Sui Jingfeng
2023-06-23 10:08 ` [PATCH v1 3/8] drm/etnaviv: Drop the second argument of the etnaviv_gem_new_impl() Sui Jingfeng
2023-07-17  9:51   ` Lucas Stach
2023-07-17 18:34     ` suijingfeng
2023-07-18  8:12       ` Lucas Stach
2023-07-18 16:16         ` suijingfeng
2023-07-18 16:24           ` Sui Jingfeng
2023-07-19  8:16           ` Lucas Stach
2023-06-23 10:08 ` [PATCH v1 4/8] drm/etnaviv: Remove surplus else after return Sui Jingfeng
2023-07-17  9:58   ` Lucas Stach
2023-06-23 10:08 ` [PATCH v1 5/8] drm/etnaviv: Keep the curly brace aligned Sui Jingfeng
2023-06-23 10:08 ` [PATCH v1 6/8] drm/etnaviv: No indentation by double tabs Sui Jingfeng
2023-06-23 10:08 ` [PATCH v1 7/8] drm/etnaviv: Add dedicated functions to create and destroy platform device Sui Jingfeng
2023-06-23 10:08 ` [PATCH v1 8/8] drm/etnaviv: Add a helper to get a pointer to the first available node Sui Jingfeng
2023-07-17 10:07   ` Lucas Stach
2023-07-17 10:20     ` suijingfeng
2023-07-17 10:36     ` Sui Jingfeng
2023-07-17  8:36 ` [PATCH v1 0/8] drm/etnaviv: Various cleanup suijingfeng
2023-07-17 10:09   ` Lucas Stach

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