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authorChristian Lamparter <chunkeey@gmail.com>2022-03-02 20:51:35 +0100
committerKalle Valo <quic_kvalo@quicinc.com>2022-03-10 17:53:38 +0200
commit23de0fa0d2a05ff71c7bc8df9d12c9f23be83f13 (patch)
tree2a14b42cbc2c90569c5fa3a9fbc92f39343c0b36
parente42fe43a216cab59b6cc0cba96ec23db2d81a5d4 (diff)
downloadlinux-23de0fa0d2a05ff71c7bc8df9d12c9f23be83f13.tar.bz2
carl9170: devres-ing hwrng_register usage
devres will take care of freeing the hwrng once it is no longer needed. Signed-off-by: Christian Lamparter <chunkeey@gmail.com> Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com> Link: https://lore.kernel.org/r/d1c16490462a9371ab3cc16a018ef5e08382a35e.1646250537.git.chunkeey@gmail.com
-rw-r--r--drivers/net/wireless/ath/carl9170/carl9170.h1
-rw-r--r--drivers/net/wireless/ath/carl9170/main.c29
2 files changed, 3 insertions, 27 deletions
diff --git a/drivers/net/wireless/ath/carl9170/carl9170.h b/drivers/net/wireless/ath/carl9170/carl9170.h
index 84a8ce0784b1..ba29b4aebe9f 100644
--- a/drivers/net/wireless/ath/carl9170/carl9170.h
+++ b/drivers/net/wireless/ath/carl9170/carl9170.h
@@ -458,7 +458,6 @@ struct ar9170 {
# define CARL9170_HWRNG_CACHE_SIZE CARL9170_MAX_CMD_PAYLOAD_LEN
struct {
struct hwrng rng;
- bool initialized;
char name[30 + 1];
u16 cache[CARL9170_HWRNG_CACHE_SIZE / sizeof(u16)];
unsigned int cache_idx;
diff --git a/drivers/net/wireless/ath/carl9170/main.c b/drivers/net/wireless/ath/carl9170/main.c
index f6974aff0c59..9495b3da1978 100644
--- a/drivers/net/wireless/ath/carl9170/main.c
+++ b/drivers/net/wireless/ath/carl9170/main.c
@@ -1539,7 +1539,7 @@ static int carl9170_rng_get(struct ar9170 *ar)
BUILD_BUG_ON(RB > CARL9170_MAX_CMD_PAYLOAD_LEN);
- if (!IS_ACCEPTING_CMD(ar) || !ar->rng.initialized)
+ if (!IS_ACCEPTING_CMD(ar))
return -EAGAIN;
count = ARRAY_SIZE(ar->rng.cache);
@@ -1585,14 +1585,6 @@ static int carl9170_rng_read(struct hwrng *rng, u32 *data)
return sizeof(u16);
}
-static void carl9170_unregister_hwrng(struct ar9170 *ar)
-{
- if (ar->rng.initialized) {
- hwrng_unregister(&ar->rng.rng);
- ar->rng.initialized = false;
- }
-}
-
static int carl9170_register_hwrng(struct ar9170 *ar)
{
int err;
@@ -1603,25 +1595,14 @@ static int carl9170_register_hwrng(struct ar9170 *ar)
ar->rng.rng.data_read = carl9170_rng_read;
ar->rng.rng.priv = (unsigned long)ar;
- if (WARN_ON(ar->rng.initialized))
- return -EALREADY;
-
- err = hwrng_register(&ar->rng.rng);
+ err = devm_hwrng_register(&ar->udev->dev, &ar->rng.rng);
if (err) {
dev_err(&ar->udev->dev, "Failed to register the random "
"number generator (%d)\n", err);
return err;
}
- ar->rng.initialized = true;
-
- err = carl9170_rng_get(ar);
- if (err) {
- carl9170_unregister_hwrng(ar);
- return err;
- }
-
- return 0;
+ return carl9170_rng_get(ar);
}
#endif /* CONFIG_CARL9170_HWRNG */
@@ -2064,10 +2045,6 @@ void carl9170_unregister(struct ar9170 *ar)
}
#endif /* CONFIG_CARL9170_WPC */
-#ifdef CONFIG_CARL9170_HWRNG
- carl9170_unregister_hwrng(ar);
-#endif /* CONFIG_CARL9170_HWRNG */
-
carl9170_cancel_worker(ar);
cancel_work_sync(&ar->restart_work);