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gpu: host1x: NULL check before get_rate

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Avoid calling get_rate function pointer when it is not supported by
the client driver.

Bug 4338396

Signed-off-by: Johnny Liu <johnliu@nvidia.com>
Change-Id: Iee7f26865d82235de7a5b41347546c1195a7ea48
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/3000315
Reviewed-by: Mikko Perttunen <mperttunen@nvidia.com>
GVS: Gerrit_Virtual_Submit <buildbot_gerritrpt@nvidia.com>
This commit is contained in:
Johnny Liu
2023-10-19 07:25:22 +00:00
committed by mobile promotions
parent f2653ba797
commit cbde6ba274
1 changed files with 4 additions and 0 deletions
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4
drivers/gpu/host1x/actmon.c
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@@ -7,6 +7,7 @@
#include <linux/clk.h> #include <linux/clk.h>
#include <linux/debugfs.h> #include <linux/debugfs.h>
#include <linux/errno.h>
#include <linux/fs.h> #include <linux/fs.h>
#include <linux/host1x-next.h> #include <linux/host1x-next.h>
@@ -191,6 +192,9 @@ static int host1x_actmon_module_avg_norm_get(void *data, u64 *val)
unsigned long client_freq; unsigned long client_freq;
u32 active_clks, client_clks; u32 active_clks, client_clks;
if (!client->ops->get_rate)
return -ENOTSUPP;
active_clks = actmon_module_readl(module, HOST1X_ACTMON_MODULE_AVG_COUNT_REG); active_clks = actmon_module_readl(module, HOST1X_ACTMON_MODULE_AVG_COUNT_REG);
client_freq = client->ops->get_rate(client); client_freq = client->ops->get_rate(client);