lisa/android_kernel_xiaomi_sm8350
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msm: ipa3: code changes to fix kernel panic error

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This Issue is seen by Enabling CONFIG_DEBUG_ATOMIC_SLEEP=y and boot the 
device.To avoid going into kernel panic state,changed the function
calls order of spin_lock() and idr_preload() after calling 
kmem_cache_zalloc().Originally, these two functions were called 
before calling kmem_cache_zalloc().

Change-Id: I2738548abd4148828e7d9436415c5c4d769680b9
Signed-off-by: Jagadeesh Ponduru <jponduru@codeaurora.org>
This commit is contained in:
Jagadeesh Ponduru 2021-08-16 15:29:01 +05:30
parent 56b50e9752
commit 194b0bdb4d
1 changed files with 2 additions and 5 deletions
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7
drivers/platform/msm/ipa/ipa_v3/ipa_utils.c
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@ -7120,16 +7120,13 @@ int ipa3_alloc_counter_id(struct ipa_ioc_flt_rt_counter_alloc *header)
{
int i, unused_cnt, unused_max, unused_start_id;
struct ipa_ioc_flt_rt_counter_alloc *counter;
idr_preload(GFP_KERNEL);
spin_lock(&ipa3_ctx->flt_rt_counters.hdl_lock);
counter = kmem_cache_zalloc(ipa3_ctx->fnr_stats_cache, GFP_KERNEL);
if (!counter) {
IPAERR_RL("failed to alloc fnr stats counter object\n");
spin_unlock(&ipa3_ctx->flt_rt_counters.hdl_lock);
return -ENOMEM;
}
idr_preload(GFP_KERNEL);
spin_lock(&ipa3_ctx->flt_rt_counters.hdl_lock);
memcpy(counter, header, sizeof(struct ipa_ioc_flt_rt_counter_alloc));
/* allocate hw counters */
counter->hw_counter.start_id = 0;