Currently, tha ast-driver just maps the PCI-dev's regions with pcim_iomap(). It does not actually reserve the regions exclusively with, e.g., pci_request_regions().
Replace the calls to pcim_iomap() with ones to pcim_iomap_regions() to reserve and map the regions simultaneously. Suggested-by: Thomas Zimmermann <tzimmerm...@suse.de> Signed-off-by: Philipp Stanner <pstan...@redhat.com> --- ¡Hola! I picked up the memory-region-request-task from the DRM-TODO-List [1] and began with this driver. Please have a first look. I wasn't entirely sure about -ENOMEM... for example, as far as my understanding goes, it should not be able to fail anyways in the second call. I don't have the server-hardware, thus, can't test it on a physical machine. Please tell me what you think. P. [1] https://dri.freedesktop.org/docs/drm/gpu/todo.html#request-memory-regions-in-all-drivers --- drivers/gpu/drm/ast/ast_main.c | 15 +++++++++++---- 1 file changed, 11 insertions(+), 4 deletions(-) diff --git a/drivers/gpu/drm/ast/ast_main.c b/drivers/gpu/drm/ast/ast_main.c index dae365ed3969..1004c6628938 100644 --- a/drivers/gpu/drm/ast/ast_main.c +++ b/drivers/gpu/drm/ast/ast_main.c @@ -444,9 +444,13 @@ struct ast_device *ast_device_create(const struct drm_driver *drv, if (ret) return ERR_PTR(ret); - ast->regs = pcim_iomap(pdev, 1, 0); + ret = pcim_iomap_regions(pdev, BIT(1), 0); + if (ret) + return ERR_PTR(ret); + + ast->regs = pcim_iomap_table(pdev)[1]; if (!ast->regs) - return ERR_PTR(-EIO); + return ERR_PTR(-ENOMEM); /* * After AST2500, MMIO is enabled by default, and it should be adopted @@ -461,9 +465,12 @@ struct ast_device *ast_device_create(const struct drm_driver *drv, /* "map" IO regs if the above hasn't done so already */ if (!ast->ioregs) { - ast->ioregs = pcim_iomap(pdev, 2, 0); + ret = pcim_iomap_regions(pdev, BIT(2), 0); + if (ret) + return ERR_PTR(ret); + ast->ioregs = pcim_iomap_table(pdev)[2]; if (!ast->ioregs) - return ERR_PTR(-EIO); + return ERR_PTR(-ENOMEM); } if (!ast_is_vga_enabled(dev)) { -- 2.41.0
