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| author | Alex Bennée <alex.bennee@linaro.org> | 2016-01-06 14:04:31 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-01-28 23:34:36 -0800 |
| commit | 23c5ee21c46ba694681e2378e64a475b5c68f02c (patch) | |
| tree | 9a64093a2a85e85837589cc542e9f2a070d6b5ab /drivers | |
| parent | bd2f348db5033b88b8b81caf58e7bdabf0b6961d (diff) | |
| download | linux-23c5ee21c46ba694681e2378e64a475b5c68f02c.tar.gz linux-23c5ee21c46ba694681e2378e64a475b5c68f02c.tar.bz2 linux-23c5ee21c46ba694681e2378e64a475b5c68f02c.zip | |
goldfish_pipe: don't be clever with #define offsets
It just makes it harder to figure out which commands are being used.
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Jin Qian <jinqian@android.com>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/platform/goldfish/goldfish_pipe.c | 16 |
1 files changed, 5 insertions, 11 deletions
diff --git a/drivers/platform/goldfish/goldfish_pipe.c b/drivers/platform/goldfish/goldfish_pipe.c index e7a29e2750c6..0fb3a34f5991 100644 --- a/drivers/platform/goldfish/goldfish_pipe.c +++ b/drivers/platform/goldfish/goldfish_pipe.c @@ -90,12 +90,6 @@ #define CMD_WRITE_BUFFER 4 /* send a user buffer to the emulator */ #define CMD_WAKE_ON_WRITE 5 /* tell the emulator to wake us when writing is possible */ - -/* The following commands are related to read operations, they must be - * listed in the same order than the corresponding write ones, since we - * will use (CMD_READ_BUFFER - CMD_WRITE_BUFFER) as a special offset - * in goldfish_pipe_read_write() below. - */ #define CMD_READ_BUFFER 6 /* receive a user buffer from the emulator */ #define CMD_WAKE_ON_READ 7 /* tell the emulator to wake us when reading * is possible */ @@ -272,8 +266,6 @@ static ssize_t goldfish_pipe_read_write(struct file *filp, char __user *buffer, unsigned long irq_flags; struct goldfish_pipe *pipe = filp->private_data; struct goldfish_pipe_dev *dev = pipe->dev; - const int cmd_offset = is_write ? 0 - : (CMD_READ_BUFFER - CMD_WRITE_BUFFER); unsigned long address, address_end; int ret = 0; @@ -325,7 +317,8 @@ static ssize_t goldfish_pipe_read_write(struct file *filp, char __user *buffer, /* Now, try to transfer the bytes in the current page */ spin_lock_irqsave(&dev->lock, irq_flags); - if (access_with_param(dev, CMD_WRITE_BUFFER + cmd_offset, + if (access_with_param(dev, + is_write ? CMD_WRITE_BUFFER : CMD_READ_BUFFER, address, avail, pipe, &status)) { gf_write_ptr(pipe, dev->base + PIPE_REG_CHANNEL, dev->base + PIPE_REG_CHANNEL_HIGH); @@ -333,7 +326,7 @@ static ssize_t goldfish_pipe_read_write(struct file *filp, char __user *buffer, gf_write_ptr((void *)address, dev->base + PIPE_REG_ADDRESS, dev->base + PIPE_REG_ADDRESS_HIGH); - writel(CMD_WRITE_BUFFER + cmd_offset, + writel(is_write ? CMD_WRITE_BUFFER : CMD_READ_BUFFER, dev->base + PIPE_REG_COMMAND); status = readl(dev->base + PIPE_REG_STATUS); } @@ -370,7 +363,8 @@ static ssize_t goldfish_pipe_read_write(struct file *filp, char __user *buffer, set_bit(wakeBit, &pipe->flags); /* Tell the emulator we're going to wait for a wake event */ - goldfish_cmd(pipe, CMD_WAKE_ON_WRITE + cmd_offset); + goldfish_cmd(pipe, + is_write ? CMD_WAKE_ON_WRITE : CMD_WAKE_ON_READ); /* Unlock the pipe, then wait for the wake signal */ mutex_unlock(&pipe->lock); |