Merge tag 'dmaengine-6.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vkoul/dmaengine

Pull dmaengine updates from Vinod Koul:

 - Big pile of __counted_by attribute annotations to several structures
   for bounds checking of flexible arrays at run-time

 - Another big pile platform remove callback returning void changes

 - Device tree device_get_match_data() usage and dropping
   of_match_device() calls

 - Minor driver updates to pxa, idxd fsl, hisi etc drivers

* tag 'dmaengine-6.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vkoul/dmaengine: (106 commits)
  dmaengine: stm32-mdma: correct desc prep when channel running
  dmaengine: dw-axi-dmac: Add support DMAX_NUM_CHANNELS > 16
  dmaengine: xilinx: xilinx_dma: Fix kernel doc about xilinx_dma_remove()
  dmaengine: mmp_tdma: drop unused variable 'of_id'
  MAINTAINERS: Add entries for NXP(Freescale) eDMA drivers
  dmaengine: xilinx: xdma: Support cyclic transfers
  dmaengine: xilinx: xdma: Prepare the introduction of cyclic transfers
  dmaengine: Drop unnecessary of_match_device() calls
  dmaengine: Use device_get_match_data()
  dmaengine: pxa_dma: Annotate struct pxad_desc_sw with __counted_by
  dmaengine: pxa_dma: Remove an erroneous BUG_ON() in pxad_free_desc()
  dmaengine: xilinx: xdma: Use resource_size() in xdma_probe()
  dmaengine: fsl-dpaa2-qdma: Remove redundant initialization owner in dpaa2_qdma_driver
  dmaengine: Remove unused declaration dma_chan_cleanup()
  dmaengine: mmp: fix Wvoid-pointer-to-enum-cast warning
  dmaengine: qcom: fix Wvoid-pointer-to-enum-cast warning
  dmaengine: fsl-edma: Remove redundant dev_err() for platform_get_irq()
  dmaengine: ep93xx_dma: Annotate struct ep93xx_dma_engine with __counted_by
  dmaengine: idxd: add wq driver name support for accel-config user tool
  dmaengine: fsl-edma: Annotate struct struct fsl_edma_engine with __counted_by
  ...

6 files changed, 61 insertions, 5 deletions

diff --git a/drivers/dma/idxd/Makefile b/drivers/dma/idxd/Makefile
index dc096839ac63..c5e679070e46 100644
--- a/drivers/dma/idxd/Makefile
+++ b/drivers/dma/idxd/Makefile
@@ -1,12 +1,12 @@
 ccflags-y += -DDEFAULT_SYMBOL_NAMESPACE=IDXD
 
+obj-$(CONFIG_INTEL_IDXD_BUS) += idxd_bus.o
+idxd_bus-y := bus.o
+
 obj-$(CONFIG_INTEL_IDXD) += idxd.o
 idxd-y := init.o irq.o device.o sysfs.o submit.o dma.o cdev.o debugfs.o
 
 idxd-$(CONFIG_INTEL_IDXD_PERFMON) += perfmon.o
 
-obj-$(CONFIG_INTEL_IDXD_BUS) += idxd_bus.o
-idxd_bus-y := bus.o
-
 obj-$(CONFIG_INTEL_IDXD_COMPAT) += idxd_compat.o
 idxd_compat-y := compat.o
diff --git a/drivers/dma/idxd/cdev.c b/drivers/dma/idxd/cdev.c
index d32deb9b4e3d..0423655f5a88 100644
--- a/drivers/dma/idxd/cdev.c
+++ b/drivers/dma/idxd/cdev.c
@@ -509,6 +509,7 @@ void idxd_wq_del_cdev(struct idxd_wq *wq)
 
 static int idxd_user_drv_probe(struct idxd_dev *idxd_dev)
 {
+	struct device *dev = &idxd_dev->conf_dev;
 	struct idxd_wq *wq = idxd_dev_to_wq(idxd_dev);
 	struct idxd_device *idxd = wq->idxd;
 	int rc;
@@ -536,6 +537,12 @@ static int idxd_user_drv_probe(struct idxd_dev *idxd_dev)
 
 	mutex_lock(&wq->wq_lock);
 
+	if (!idxd_wq_driver_name_match(wq, dev)) {
+		idxd->cmd_status = IDXD_SCMD_WQ_NO_DRV_NAME;
+		rc = -ENODEV;
+		goto wq_err;
+	}
+
 	wq->wq = create_workqueue(dev_name(wq_confdev(wq)));
 	if (!wq->wq) {
 		rc = -ENOMEM;
diff --git a/drivers/dma/idxd/dma.c b/drivers/dma/idxd/dma.c
index 07623fb0f52f..47a01893cfdb 100644
--- a/drivers/dma/idxd/dma.c
+++ b/drivers/dma/idxd/dma.c
@@ -306,6 +306,12 @@ static int idxd_dmaengine_drv_probe(struct idxd_dev *idxd_dev)
 		return -ENXIO;
 
 	mutex_lock(&wq->wq_lock);
+	if (!idxd_wq_driver_name_match(wq, dev)) {
+		idxd->cmd_status = IDXD_SCMD_WQ_NO_DRV_NAME;
+		rc = -ENODEV;
+		goto err;
+	}
+
 	wq->type = IDXD_WQT_KERNEL;
 
 	rc = drv_enable_wq(wq);
diff --git a/drivers/dma/idxd/idxd.h b/drivers/dma/idxd/idxd.h
index e269ca1f4862..1e89c80a07fc 100644
--- a/drivers/dma/idxd/idxd.h
+++ b/drivers/dma/idxd/idxd.h
@@ -159,6 +159,8 @@ struct idxd_cdev {
 	int minor;
 };
 
+#define DRIVER_NAME_SIZE		128
+
 #define IDXD_ALLOCATED_BATCH_SIZE	128U
 #define WQ_NAME_SIZE   1024
 #define WQ_TYPE_SIZE   10
@@ -227,6 +229,8 @@ struct idxd_wq {
 	/* Lock to protect upasid_xa access. */
 	struct mutex uc_lock;
 	struct xarray upasid_xa;
+
+	char driver_name[DRIVER_NAME_SIZE + 1];
 };
 
 struct idxd_engine {
@@ -646,6 +650,11 @@ static inline void idxd_wqcfg_set_max_batch_shift(int idxd_type, union wqcfg *wq
 		wqcfg->max_batch_shift = max_batch_shift;
 }
 
+static inline int idxd_wq_driver_name_match(struct idxd_wq *wq, struct device *dev)
+{
+	return (strncmp(wq->driver_name, dev->driver->name, strlen(dev->driver->name)) == 0);
+}
+
 int __must_check __idxd_driver_register(struct idxd_device_driver *idxd_drv,
 					struct module *module, const char *mod_name);
 #define idxd_driver_register(driver) \
diff --git a/drivers/dma/idxd/irq.c b/drivers/dma/idxd/irq.c
index b501320a9c7a..2183d7f9cdbd 100644
--- a/drivers/dma/idxd/irq.c
+++ b/drivers/dma/idxd/irq.c
@@ -434,8 +434,8 @@ irqreturn_t idxd_misc_thread(int vec, void *data)
 		val |= IDXD_INTC_ERR;
 
 		for (i = 0; i < 4; i++)
-			dev_warn(dev, "err[%d]: %#16.16llx\n",
-				 i, idxd->sw_err.bits[i]);
+			dev_warn_ratelimited(dev, "err[%d]: %#16.16llx\n",
+					     i, idxd->sw_err.bits[i]);
 		err = true;
 	}
 
diff --git a/drivers/dma/idxd/sysfs.c b/drivers/dma/idxd/sysfs.c
index 7caba90d85b3..523ae0dff7d4 100644
--- a/drivers/dma/idxd/sysfs.c
+++ b/drivers/dma/idxd/sysfs.c
@@ -1259,6 +1259,39 @@ err:
 static struct device_attribute dev_attr_wq_op_config =
 		__ATTR(op_config, 0644, wq_op_config_show, wq_op_config_store);
 
+static ssize_t wq_driver_name_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+	struct idxd_wq *wq = confdev_to_wq(dev);
+
+	return sysfs_emit(buf, "%s\n", wq->driver_name);
+}
+
+static ssize_t wq_driver_name_store(struct device *dev, struct device_attribute *attr,
+				    const char *buf, size_t count)
+{
+	struct idxd_wq *wq = confdev_to_wq(dev);
+	char *input, *pos;
+
+	if (wq->state != IDXD_WQ_DISABLED)
+		return -EPERM;
+
+	if (strlen(buf) > DRIVER_NAME_SIZE || strlen(buf) == 0)
+		return -EINVAL;
+
+	input = kstrndup(buf, count, GFP_KERNEL);
+	if (!input)
+		return -ENOMEM;
+
+	pos = strim(input);
+	memset(wq->driver_name, 0, DRIVER_NAME_SIZE + 1);
+	sprintf(wq->driver_name, "%s", pos);
+	kfree(input);
+	return count;
+}
+
+static struct device_attribute dev_attr_wq_driver_name =
+		__ATTR(driver_name, 0644, wq_driver_name_show, wq_driver_name_store);
+
 static struct attribute *idxd_wq_attributes[] = {
 	&dev_attr_wq_clients.attr,
 	&dev_attr_wq_state.attr,
@@ -1278,6 +1311,7 @@ static struct attribute *idxd_wq_attributes[] = {
 	&dev_attr_wq_occupancy.attr,
 	&dev_attr_wq_enqcmds_retries.attr,
 	&dev_attr_wq_op_config.attr,
+	&dev_attr_wq_driver_name.attr,
 	NULL,
 };