cxl: Drop commands if the PCI channel is not in normal state

[linux-beck.git] / drivers / misc / cxl / file.c

diff --git a/drivers/misc/cxl/file.c b/drivers/misc/cxl/file.c
index c8c8bfa2679b4f1b472284faa22a0b27f7fa5d24..57bdb473749f7373a190aff1c0c6919ca7e68dd8 100644 (file)
--- a/drivers/misc/cxl/file.c
+++ b/drivers/misc/cxl/file.c
@@ -73,6 +73,11 @@ static int __afu_open(struct inode *inode, struct file *file, bool master)
        if (!afu->current_mode)
                goto err_put_afu;
 
+       if (!cxl_adapter_link_ok(adapter)) {
+               rc = -EIO;
+               goto err_put_afu;
+       }
+
        if (!(ctx = cxl_context_alloc())) {
                rc = -ENOMEM;
                goto err_put_afu;
@@ -238,6 +243,9 @@ long afu_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
        if (ctx->status == CLOSED)
                return -EIO;
 
+       if (!cxl_adapter_link_ok(ctx->afu->adapter))
+               return -EIO;
+
        pr_devel("afu_ioctl\n");
        switch (cmd) {
        case CXL_IOCTL_START_WORK:
@@ -265,6 +273,9 @@ int afu_mmap(struct file *file, struct vm_area_struct *vm)
        if (ctx->status != STARTED)
                return -EIO;
 
+       if (!cxl_adapter_link_ok(ctx->afu->adapter))
+               return -EIO;
+
        return cxl_context_iomap(ctx, vm);
 }
 
@@ -309,6 +320,9 @@ ssize_t afu_read(struct file *file, char __user *buf, size_t count,
        int rc;
        DEFINE_WAIT(wait);
 
+       if (!cxl_adapter_link_ok(ctx->afu->adapter))
+               return -EIO;
+
        if (count < CXL_READ_MIN_SIZE)
                return -EINVAL;
 
@@ -319,6 +333,11 @@ ssize_t afu_read(struct file *file, char __user *buf, size_t count,
                if (ctx_event_pending(ctx))
                        break;
 
+               if (!cxl_adapter_link_ok(ctx->afu->adapter)) {
+                       rc = -EIO;
+                       goto out;
+               }
+
                if (file->f_flags & O_NONBLOCK) {
                        rc = -EAGAIN;
                        goto out;