Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753085AbbEDNMe (ORCPT ); Mon, 4 May 2015 09:12:34 -0400 Received: from mail-wi0-f174.google.com ([209.85.212.174]:34649 "EHLO mail-wi0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752222AbbEDNMZ (ORCPT ); Mon, 4 May 2015 09:12:25 -0400 From: Peter Senna Tschudin To: gregkh@linuxfoundation.org, alan@linux.intel.com, dan.carpenter@oracle.com, geert@linux-m68k.org, devel@driverdev.osuosl.org, jun.j.tian@intel.com, linux-kernel@vger.kernel.org, schwab@linux-m68k.org, garret.kelly@gmail.com, octavian.purdila@intel.com, nnk@google.com Cc: Peter Senna Tschudin Subject: [PATCH V5] staging: goldfish: Fix pointer cast for 32 bits Date: Mon, 4 May 2015 15:11:18 +0200 Message-Id: <1430745078-15969-1-git-send-email-peter.senna@gmail.com> X-Mailer: git-send-email 2.1.0 In-Reply-To: <20150503183248.GC7356@kroah.com> References: <20150503183248.GC7356@kroah.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 7129 Lines: 175 As the first argument of gf_write64() was of type unsigned long, and as some calls to gf_write64() were casting the first argument from void * to u64 the compiler and/or sparse were printing warnings for casts of wrong sizes when compiling for i386. This patch changes the type of the first argument of gf_write64() to void *, and update calls to the function. This change fixed the warnings and allowed to remove casts from 6 calls to gf_write64(). In addition gf_write64() was renamed to gf_write_ptr() as the name was misleading because it only writes 32 bits on 32 bit systems. gf_write_dma_addr() was added to handle dma_addr_t values which is used at drivers/staging/goldfish/goldfish_audio.c. Signed-off-by: Dan Carpenter Signed-off-by: Peter Senna Tschudin --- Tested by compilation only for x86 and for x86_64. Changes from V4: - Added the function gf_write_dma_addr() - Changed the subject line Changes from V3: - Changed type of first argument of gf_write64 - Renamed from gf_write64 to gf_write_ptr - Updated all calls to gf_write_ptr Changes from V2: - Fixed spelling of complains - Updated commit message Changes from V1: - Updated commit message drivers/platform/goldfish/goldfish_pipe.c | 18 +++++++++--------- drivers/staging/goldfish/goldfish_audio.c | 2 +- drivers/staging/goldfish/goldfish_nand.c | 2 +- drivers/tty/goldfish.c | 4 ++-- include/linux/goldfish.h | 18 ++++++++++++++---- 5 files changed, 27 insertions(+), 17 deletions(-) diff --git a/drivers/platform/goldfish/goldfish_pipe.c b/drivers/platform/goldfish/goldfish_pipe.c index d9a09d9..aad16bc 100644 --- a/drivers/platform/goldfish/goldfish_pipe.c +++ b/drivers/platform/goldfish/goldfish_pipe.c @@ -158,8 +158,8 @@ static u32 goldfish_cmd_status(struct goldfish_pipe *pipe, u32 cmd) struct goldfish_pipe_dev *dev = pipe->dev; spin_lock_irqsave(&dev->lock, flags); - gf_write64((u64)(unsigned long)pipe, dev->base + PIPE_REG_CHANNEL, - dev->base + PIPE_REG_CHANNEL_HIGH); + gf_write_ptr(pipe, dev->base + PIPE_REG_CHANNEL, + dev->base + PIPE_REG_CHANNEL_HIGH); writel(cmd, dev->base + PIPE_REG_COMMAND); status = readl(dev->base + PIPE_REG_STATUS); spin_unlock_irqrestore(&dev->lock, flags); @@ -172,8 +172,8 @@ static void goldfish_cmd(struct goldfish_pipe *pipe, u32 cmd) struct goldfish_pipe_dev *dev = pipe->dev; spin_lock_irqsave(&dev->lock, flags); - gf_write64((u64)(unsigned long)pipe, dev->base + PIPE_REG_CHANNEL, - dev->base + PIPE_REG_CHANNEL_HIGH); + gf_write_ptr(pipe, dev->base + PIPE_REG_CHANNEL, + dev->base + PIPE_REG_CHANNEL_HIGH); writel(cmd, dev->base + PIPE_REG_COMMAND); spin_unlock_irqrestore(&dev->lock, flags); } @@ -327,12 +327,12 @@ static ssize_t goldfish_pipe_read_write(struct file *filp, char __user *buffer, spin_lock_irqsave(&dev->lock, irq_flags); if (access_with_param(dev, CMD_WRITE_BUFFER + cmd_offset, address, avail, pipe, &status)) { - gf_write64((u64)(unsigned long)pipe, - dev->base + PIPE_REG_CHANNEL, - dev->base + PIPE_REG_CHANNEL_HIGH); + gf_write_ptr(pipe, dev->base + PIPE_REG_CHANNEL, + dev->base + PIPE_REG_CHANNEL_HIGH); writel(avail, dev->base + PIPE_REG_SIZE); - gf_write64(address, dev->base + PIPE_REG_ADDRESS, - dev->base + PIPE_REG_ADDRESS_HIGH); + gf_write_ptr((void *)address, + dev->base + PIPE_REG_ADDRESS, + dev->base + PIPE_REG_ADDRESS_HIGH); writel(CMD_WRITE_BUFFER + cmd_offset, dev->base + PIPE_REG_COMMAND); status = readl(dev->base + PIPE_REG_STATUS); diff --git a/drivers/staging/goldfish/goldfish_audio.c b/drivers/staging/goldfish/goldfish_audio.c index 702ae04..b0927e4 100644 --- a/drivers/staging/goldfish/goldfish_audio.c +++ b/drivers/staging/goldfish/goldfish_audio.c @@ -63,7 +63,7 @@ struct goldfish_audio { #define AUDIO_READ(data, addr) (readl(data->reg_base + addr)) #define AUDIO_WRITE(data, addr, x) (writel(x, data->reg_base + addr)) #define AUDIO_WRITE64(data, addr, addr2, x) \ - (gf_write64((u64)(x), data->reg_base + addr, data->reg_base+addr2)) + (gf_write_dma_addr((x), data->reg_base + addr, data->reg_base+addr2)) /* * temporary variable used between goldfish_audio_probe() and diff --git a/drivers/staging/goldfish/goldfish_nand.c b/drivers/staging/goldfish/goldfish_nand.c index 213877a..66ae48f 100644 --- a/drivers/staging/goldfish/goldfish_nand.c +++ b/drivers/staging/goldfish/goldfish_nand.c @@ -87,7 +87,7 @@ static u32 goldfish_nand_cmd(struct mtd_info *mtd, enum nand_cmd cmd, writel((u32)(addr >> 32), base + NAND_ADDR_HIGH); writel((u32)addr, base + NAND_ADDR_LOW); writel(len, base + NAND_TRANSFER_SIZE); - gf_write64((u64)ptr, base + NAND_DATA, base + NAND_DATA_HIGH); + gf_write_ptr(ptr, base + NAND_DATA, base + NAND_DATA_HIGH); writel(cmd, base + NAND_COMMAND); rv = readl(base + NAND_RESULT); } diff --git a/drivers/tty/goldfish.c b/drivers/tty/goldfish.c index 0655fec..0f82c0b 100644 --- a/drivers/tty/goldfish.c +++ b/drivers/tty/goldfish.c @@ -59,7 +59,7 @@ static void goldfish_tty_do_write(int line, const char *buf, unsigned count) struct goldfish_tty *qtty = &goldfish_ttys[line]; void __iomem *base = qtty->base; spin_lock_irqsave(&qtty->lock, irq_flags); - gf_write64((u64)buf, base + GOLDFISH_TTY_DATA_PTR, + gf_write_ptr(buf, base + GOLDFISH_TTY_DATA_PTR, base + GOLDFISH_TTY_DATA_PTR_HIGH); writel(count, base + GOLDFISH_TTY_DATA_LEN); writel(GOLDFISH_TTY_CMD_WRITE_BUFFER, base + GOLDFISH_TTY_CMD); @@ -81,7 +81,7 @@ static irqreturn_t goldfish_tty_interrupt(int irq, void *dev_id) count = tty_prepare_flip_string(&qtty->port, &buf, count); spin_lock_irqsave(&qtty->lock, irq_flags); - gf_write64((u64)buf, base + GOLDFISH_TTY_DATA_PTR, + gf_write_ptr(buf, base + GOLDFISH_TTY_DATA_PTR, base + GOLDFISH_TTY_DATA_PTR_HIGH); writel(count, base + GOLDFISH_TTY_DATA_LEN); writel(GOLDFISH_TTY_CMD_READ_BUFFER, base + GOLDFISH_TTY_CMD); diff --git a/include/linux/goldfish.h b/include/linux/goldfish.h index 569236e..37a5e2f 100644 --- a/include/linux/goldfish.h +++ b/include/linux/goldfish.h @@ -3,13 +3,23 @@ /* Helpers for Goldfish virtual platform */ -static inline void gf_write64(unsigned long data, - void __iomem *portl, void __iomem *porth) +static inline void gf_write_ptr(void *ptr, void __iomem *portl, + void __iomem *porth) { - writel((u32)data, portl); + writel((u32)(unsigned long)ptr, portl); #ifdef CONFIG_64BIT - writel(data>>32, porth); + writel((unsigned long)ptr >> 32, porth); #endif } +static inline void gf_write_dma_addr(dma_addr_t addr, void __iomem *portl, + void __iomem *porth) +{ + writel((u32)addr, portl); +#ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT + writel(addr >> 32, porth); +#endif +} + + #endif /* __LINUX_GOLDFISH_H */ -- 2.1.0 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/