Merge tag 'v6.1-p1' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6

Pull crypto updates from Herbert Xu:
 "API:
   - Feed untrusted RNGs into /dev/random
   - Allow HWRNG sleeping to be more interruptible
   - Create lib/utils module
   - Setting private keys no longer required for akcipher
   - Remove tcrypt mode=1000
   - Reorganised Kconfig entries

  Algorithms:
   - Load x86/sha512 based on CPU features
   - Add AES-NI/AVX/x86_64/GFNI assembler implementation of aria cipher

  Drivers:
   - Add HACE crypto driver aspeed"

* tag 'v6.1-p1' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6: (124 commits)
  crypto: aspeed - Remove redundant dev_err call
  crypto: scatterwalk - Remove unused inline function scatterwalk_aligned()
  crypto: aead - Remove unused inline functions from aead
  crypto: bcm - Simplify obtain the name for cipher
  crypto: marvell/octeontx - use sysfs_emit() to instead of scnprintf()
  hwrng: core - start hwrng kthread also for untrusted sources
  crypto: zip - remove the unneeded result variable
  crypto: qat - add limit to linked list parsing
  crypto: octeontx2 - Remove the unneeded result variable
  crypto: ccp - Remove the unneeded result variable
  crypto: aspeed - Fix check for platform_get_irq() errors
  crypto: virtio - fix memory-leak
  crypto: cavium - prevent integer overflow loading firmware
  crypto: marvell/octeontx - prevent integer overflows
  crypto: aspeed - fix build error when only CRYPTO_DEV_ASPEED is enabled
  crypto: hisilicon/qm - fix the qos value initialization
  crypto: sun4i-ss - use DEFINE_SHOW_ATTRIBUTE to simplify sun4i_ss_debugfs
  crypto: tcrypt - add async speed test for aria cipher
  crypto: aria-avx - add AES-NI/AVX/x86_64/GFNI assembler implementation of aria cipher
  crypto: aria - prepare generic module for optimized implementations
  ...

3 files changed, 41 insertions, 69 deletions

diff --git a/drivers/char/hw_random/arm_smccc_trng.c b/drivers/char/hw_random/arm_smccc_trng.c
index b24ac39a903b..e34c3ea692b6 100644
--- a/drivers/char/hw_random/arm_smccc_trng.c
+++ b/drivers/char/hw_random/arm_smccc_trng.c
@@ -71,8 +71,6 @@ static int smccc_trng_read(struct hwrng *rng, void *data, size_t max, bool wait)
 				  MAX_BITS_PER_CALL);
 
 		arm_smccc_1_1_invoke(ARM_SMCCC_TRNG_RND, bits, &res);
-		if ((int)res.a0 < 0)
-			return (int)res.a0;
 
 		switch ((int)res.a0) {
 		case SMCCC_RET_SUCCESS:
@@ -88,6 +86,8 @@ static int smccc_trng_read(struct hwrng *rng, void *data, size_t max, bool wait)
 				return copied;
 			cond_resched();
 			break;
+		default:
+			return -EIO;
 		}
 	}
 
diff --git a/drivers/char/hw_random/core.c b/drivers/char/hw_random/core.c
index 16f227b995e8..cc002b0c2f0c 100644
--- a/drivers/char/hw_random/core.c
+++ b/drivers/char/hw_random/core.c
@@ -52,7 +52,7 @@ MODULE_PARM_DESC(default_quality,
 
 static void drop_current_rng(void);
 static int hwrng_init(struct hwrng *rng);
-static void hwrng_manage_rngd(struct hwrng *rng);
+static int hwrng_fillfn(void *unused);
 
 static inline int rng_get_data(struct hwrng *rng, u8 *buffer, size_t size,
 			       int wait);
@@ -96,6 +96,15 @@ static int set_current_rng(struct hwrng *rng)
 	drop_current_rng();
 	current_rng = rng;
 
+	/* if necessary, start hwrng thread */
+	if (!hwrng_fill) {
+		hwrng_fill = kthread_run(hwrng_fillfn, NULL, "hwrng");
+		if (IS_ERR(hwrng_fill)) {
+			pr_err("hwrng_fill thread creation failed\n");
+			hwrng_fill = NULL;
+		}
+	}
+
 	return 0;
 }
 
@@ -167,8 +176,6 @@ skip_init:
 		rng->quality = 1024;
 	current_quality = rng->quality; /* obsolete */
 
-	hwrng_manage_rngd(rng);
-
 	return 0;
 }
 
@@ -454,10 +461,6 @@ static ssize_t rng_quality_store(struct device *dev,
 	/* the best available RNG may have changed */
 	ret = enable_best_rng();
 
-	/* start/stop rngd if necessary */
-	if (current_rng)
-		hwrng_manage_rngd(current_rng);
-
 out:
 	mutex_unlock(&rng_mutex);
 	return ret ? ret : len;
@@ -507,16 +510,14 @@ static int hwrng_fillfn(void *unused)
 			rng->quality = current_quality; /* obsolete */
 		quality = rng->quality;
 		mutex_unlock(&reading_mutex);
-		put_rng(rng);
 
-		if (!quality)
-			break;
+		if (rc <= 0)
+			hwrng_msleep(rng, 10000);
 
-		if (rc <= 0) {
-			pr_warn("hwrng: no data available\n");
-			msleep_interruptible(10000);
+		put_rng(rng);
+
+		if (rc <= 0)
 			continue;
-		}
 
 		/* If we cannot credit at least one bit of entropy,
 		 * keep track of the remainder for the next iteration
@@ -533,22 +534,6 @@ static int hwrng_fillfn(void *unused)
 	return 0;
 }
 
-static void hwrng_manage_rngd(struct hwrng *rng)
-{
-	if (WARN_ON(!mutex_is_locked(&rng_mutex)))
-		return;
-
-	if (rng->quality == 0 && hwrng_fill)
-		kthread_stop(hwrng_fill);
-	if (rng->quality > 0 && !hwrng_fill) {
-		hwrng_fill = kthread_run(hwrng_fillfn, NULL, "hwrng");
-		if (IS_ERR(hwrng_fill)) {
-			pr_err("hwrng_fill thread creation failed\n");
-			hwrng_fill = NULL;
-		}
-	}
-}
-
 int hwrng_register(struct hwrng *rng)
 {
 	int err = -EINVAL;
@@ -570,6 +555,7 @@ int hwrng_register(struct hwrng *rng)
 
 	init_completion(&rng->cleanup_done);
 	complete(&rng->cleanup_done);
+	init_completion(&rng->dying);
 
 	if (!current_rng ||
 	    (!cur_rng_set_by_user && rng->quality > current_rng->quality)) {
@@ -617,6 +603,7 @@ void hwrng_unregister(struct hwrng *rng)
 
 	old_rng = current_rng;
 	list_del(&rng->list);
+	complete_all(&rng->dying);
 	if (current_rng == rng) {
 		err = enable_best_rng();
 		if (err) {
@@ -685,6 +672,14 @@ void devm_hwrng_unregister(struct device *dev, struct hwrng *rng)
 }
 EXPORT_SYMBOL_GPL(devm_hwrng_unregister);
 
+long hwrng_msleep(struct hwrng *rng, unsigned int msecs)
+{
+	unsigned long timeout = msecs_to_jiffies(msecs) + 1;
+
+	return wait_for_completion_interruptible_timeout(&rng->dying, timeout);
+}
+EXPORT_SYMBOL_GPL(hwrng_msleep);
+
 static int __init hwrng_modinit(void)
 {
 	int ret;
diff --git a/drivers/char/hw_random/imx-rngc.c b/drivers/char/hw_random/imx-rngc.c
index b05d676ca814..a1c24148ed31 100644
--- a/drivers/char/hw_random/imx-rngc.c
+++ b/drivers/char/hw_random/imx-rngc.c
@@ -245,7 +245,7 @@ static int imx_rngc_probe(struct platform_device *pdev)
 	if (IS_ERR(rngc->base))
 		return PTR_ERR(rngc->base);
 
-	rngc->clk = devm_clk_get(&pdev->dev, NULL);
+	rngc->clk = devm_clk_get_enabled(&pdev->dev, NULL);
 	if (IS_ERR(rngc->clk)) {
 		dev_err(&pdev->dev, "Can not get rng_clk\n");
 		return PTR_ERR(rngc->clk);
@@ -255,27 +255,14 @@ static int imx_rngc_probe(struct platform_device *pdev)
 	if (irq < 0)
 		return irq;
 
-	ret = clk_prepare_enable(rngc->clk);
-	if (ret)
-		return ret;
-
 	ver_id = readl(rngc->base + RNGC_VER_ID);
 	rng_type = ver_id >> RNGC_TYPE_SHIFT;
 	/*
 	 * This driver supports only RNGC and RNGB. (There's a different
 	 * driver for RNGA.)
 	 */
-	if (rng_type != RNGC_TYPE_RNGC && rng_type != RNGC_TYPE_RNGB) {
-		ret = -ENODEV;
-		goto err;
-	}
-
-	ret = devm_request_irq(&pdev->dev,
-			irq, imx_rngc_irq, 0, pdev->name, (void *)rngc);
-	if (ret) {
-		dev_err(rngc->dev, "Can't get interrupt working.\n");
-		goto err;
-	}
+	if (rng_type != RNGC_TYPE_RNGC && rng_type != RNGC_TYPE_RNGB)
+		return -ENODEV;
 
 	init_completion(&rngc->rng_op_done);
 
@@ -290,18 +277,25 @@ static int imx_rngc_probe(struct platform_device *pdev)
 
 	imx_rngc_irq_mask_clear(rngc);
 
+	ret = devm_request_irq(&pdev->dev,
+			irq, imx_rngc_irq, 0, pdev->name, (void *)rngc);
+	if (ret) {
+		dev_err(rngc->dev, "Can't get interrupt working.\n");
+		return ret;
+	}
+
 	if (self_test) {
 		ret = imx_rngc_self_test(rngc);
 		if (ret) {
 			dev_err(rngc->dev, "self test failed\n");
-			goto err;
+			return ret;
 		}
 	}
 
-	ret = hwrng_register(&rngc->rng);
+	ret = devm_hwrng_register(&pdev->dev, &rngc->rng);
 	if (ret) {
 		dev_err(&pdev->dev, "hwrng registration failed\n");
-		goto err;
+		return ret;
 	}
 
 	dev_info(&pdev->dev,
@@ -309,22 +303,6 @@ static int imx_rngc_probe(struct platform_device *pdev)
 		rng_type == RNGC_TYPE_RNGB ? 'B' : 'C',
 		(ver_id >> RNGC_VER_MAJ_SHIFT) & 0xff, ver_id & 0xff);
 	return 0;
-
-err:
-	clk_disable_unprepare(rngc->clk);
-
-	return ret;
-}
-
-static int __exit imx_rngc_remove(struct platform_device *pdev)
-{
-	struct imx_rngc *rngc = platform_get_drvdata(pdev);
-
-	hwrng_unregister(&rngc->rng);
-
-	clk_disable_unprepare(rngc->clk);
-
-	return 0;
 }
 
 static int __maybe_unused imx_rngc_suspend(struct device *dev)
@@ -355,11 +333,10 @@ MODULE_DEVICE_TABLE(of, imx_rngc_dt_ids);
 
 static struct platform_driver imx_rngc_driver = {
 	.driver = {
-		.name = "imx_rngc",
+		.name = KBUILD_MODNAME,
 		.pm = &imx_rngc_pm_ops,
 		.of_match_table = imx_rngc_dt_ids,
 	},
-	.remove = __exit_p(imx_rngc_remove),
 };
 
 module_platform_driver_probe(imx_rngc_driver, imx_rngc_probe);