linux-kernel - [PATCH 1/2] gpu: host1x: Correct allocated size for contexts

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Message-ID: <20230901115910.701518-1-cyndis@kapsi.fi>
Date:   Fri,  1 Sep 2023 14:59:09 +0300
From:   Mikko Perttunen <cyndis@...si.fi>
To:     Thierry Reding <thierry.reding@...il.com>
Cc:     Johnny Liu <johnliu@...dia.com>,
        Mikko Perttunen <mperttunen@...dia.com>,
        dri-devel@...ts.freedesktop.org, linux-tegra@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH 1/2] gpu: host1x: Correct allocated size for contexts

From: Johnny Liu <johnliu@...dia.com>

Original implementation over allocates the memory size for the
contexts list. The size of memory for the contexts list is based
on the number of iommu groups specified in the device tree.

Fixes: 8aa5bcb61612 ("gpu: host1x: Add context device management code")
Signed-off-by: Johnny Liu <johnliu@...dia.com>
Signed-off-by: Mikko Perttunen <mperttunen@...dia.com>
---
 drivers/gpu/host1x/context.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/host1x/context.c b/drivers/gpu/host1x/context.c
index a3f336edd991..955c971c528d 100644
--- a/drivers/gpu/host1x/context.c
+++ b/drivers/gpu/host1x/context.c
@@ -34,10 +34,10 @@ int host1x_memory_context_list_init(struct host1x *host1x)
 	if (err < 0)
 		return 0;
 
-	cdl->devs = kcalloc(err, sizeof(*cdl->devs), GFP_KERNEL);
+	cdl->len = err / 4;
+	cdl->devs = kcalloc(cdl->len, sizeof(*cdl->devs), GFP_KERNEL);
 	if (!cdl->devs)
 		return -ENOMEM;
-	cdl->len = err / 4;
 
 	for (i = 0; i < cdl->len; i++) {
 		ctx = &cdl->devs[i];
-- 
2.41.0