From 0bf048abebb6e69be3c1630878419d80944c3cfd Mon Sep 17 00:00:00 2001 From: Arnd Bergmann Date: Thu, 23 Jun 2016 17:54:25 +0200 Subject: [PATCH] staging: emxx_udc: allow modular build A change to the usb gadget core allowed certain API functions to be part of a loadable module, which breaks having emxx_udc built-in: drivers/staging/built-in.o: In function `nbu2ss_drv_probe': (.text+0x2428): undefined reference to `usb_ep_set_maxpacket_limit' The original patch already fixed tons of other cases that have the added dependency but apparently missed this one that now appears in an ARM allmodconfig build. This patch makes the symbol "tristate", which lets the Kconfig dependency tracking handle it correctly. To make the module actually usable, I also revert 0af61e66ee16 ("drivers/staging: make emxx_udc.c explicitly non-modular"), which Paul Gortmaker added after noticing that the Kconfig symbol was 'bool'. Compared to the original version however, I leave out the '__exit' annotation on the remove callback, as Paul pointed out that this was incorrect. Signed-off-by: Arnd Bergmann Fixes: 5a8d651a2bde ("usb: gadget: move gadget API functions to udc-core") Acked-by: Felipe Balbi Signed-off-by: Greg Kroah-Hartman --- drivers/staging/emxx_udc/Kconfig | 2 +- drivers/staging/emxx_udc/emxx_udc.c | 36 +++++++++++++++++++++++++---- 2 files changed, 33 insertions(+), 5 deletions(-) diff --git a/drivers/staging/emxx_udc/Kconfig b/drivers/staging/emxx_udc/Kconfig index cc3402020487..d7577096fb25 100644 --- a/drivers/staging/emxx_udc/Kconfig +++ b/drivers/staging/emxx_udc/Kconfig @@ -1,5 +1,5 @@ config USB_EMXX - bool "EMXX USB Function Device Controller" + tristate "EMXX USB Function Device Controller" depends on USB_GADGET && (ARCH_SHMOBILE || (ARM && COMPILE_TEST)) help The Emma Mobile series of SoCs from Renesas Electronics and diff --git a/drivers/staging/emxx_udc/emxx_udc.c b/drivers/staging/emxx_udc/emxx_udc.c index 3bd91758b2da..3b56b2826263 100644 --- a/drivers/staging/emxx_udc/emxx_udc.c +++ b/drivers/staging/emxx_udc/emxx_udc.c @@ -15,7 +15,7 @@ */ #include -#include +#include #include #include #include @@ -39,9 +39,11 @@ #include "emxx_udc.h" +#define DRIVER_DESC "EMXX UDC driver" #define DMA_ADDR_INVALID (~(dma_addr_t)0) static const char driver_name[] = "emxx_udc"; +static const char driver_desc[] = DRIVER_DESC; /*===========================================================================*/ /* Prototype */ @@ -3295,6 +3297,28 @@ static void nbu2ss_drv_shutdown(struct platform_device *pdev) _nbu2ss_disable_controller(udc); } +/*-------------------------------------------------------------------------*/ +static int nbu2ss_drv_remove(struct platform_device *pdev) +{ + struct nbu2ss_udc *udc; + struct nbu2ss_ep *ep; + int i; + + udc = &udc_controller; + + for (i = 0; i < NUM_ENDPOINTS; i++) { + ep = &udc->ep[i]; + if (ep->virt_buf) + dma_free_coherent(NULL, PAGE_SIZE, + (void *)ep->virt_buf, ep->phys_buf); + } + + /* Interrupt Handler - Release */ + free_irq(INT_VBUS, udc); + + return 0; +} + /*-------------------------------------------------------------------------*/ static int nbu2ss_drv_suspend(struct platform_device *pdev, pm_message_t state) { @@ -3347,12 +3371,16 @@ static int nbu2ss_drv_resume(struct platform_device *pdev) static struct platform_driver udc_driver = { .probe = nbu2ss_drv_probe, .shutdown = nbu2ss_drv_shutdown, + .remove = nbu2ss_drv_remove, .suspend = nbu2ss_drv_suspend, .resume = nbu2ss_drv_resume, .driver = { - .name = driver_name, - .suppress_bind_attrs = true, + .name = driver_name, }, }; -builtin_platform_driver(udc_driver); +module_platform_driver(udc_driver); + +MODULE_DESCRIPTION(DRIVER_DESC); +MODULE_AUTHOR("Renesas Electronics Corporation"); +MODULE_LICENSE("GPL"); -- 2.20.1