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author | Linus Torvalds <torvalds@linux-foundation.org> | 2017-05-04 19:07:10 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-05-04 19:15:35 -0700 |
commit | af82455f7dbd9dc20244d80d033721b30d22c065 (patch) | |
tree | 3b9246456e82ae116b57834a2f0b4a307a016474 /drivers/hv/ring_buffer.c | |
parent | 0be75179df5e20306528800fc7c6a504b12b97db (diff) | |
parent | 2a76f89fa58c769241cfc21f2614705591519ae3 (diff) | |
download | linux-stable-af82455f7dbd9dc20244d80d033721b30d22c065.tar.gz linux-stable-af82455f7dbd9dc20244d80d033721b30d22c065.tar.bz2 linux-stable-af82455f7dbd9dc20244d80d033721b30d22c065.zip |
Merge tag 'char-misc-4.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc
Pull char/misc driver updates from Greg KH:
"Here is the big set of new char/misc driver drivers and features for
4.12-rc1.
There's lots of new drivers added this time around, new firmware
drivers from Google, more auxdisplay drivers, extcon drivers, fpga
drivers, and a bunch of other driver updates. Nothing major, except if
you happen to have the hardware for these drivers, and then you will
be happy :)
All of these have been in linux-next for a while with no reported
issues"
* tag 'char-misc-4.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (136 commits)
firmware: google memconsole: Fix return value check in platform_memconsole_init()
firmware: Google VPD: Fix return value check in vpd_platform_init()
goldfish_pipe: fix build warning about using too much stack.
goldfish_pipe: An implementation of more parallel pipe
fpga fr br: update supported version numbers
fpga: region: release FPGA region reference in error path
fpga altera-hps2fpga: disable/unprepare clock on error in alt_fpga_bridge_probe()
mei: drop the TODO from samples
firmware: Google VPD sysfs driver
firmware: Google VPD: import lib_vpd source files
misc: lkdtm: Add volatile to intentional NULL pointer reference
eeprom: idt_89hpesx: Add OF device ID table
misc: ds1682: Add OF device ID table
misc: tsl2550: Add OF device ID table
w1: Remove unneeded use of assert() and remove w1_log.h
w1: Use kernel common min() implementation
uio_mf624: Align memory regions to page size and set correct offsets
uio_mf624: Refactor memory info initialization
uio: Allow handling of non page-aligned memory regions
hangcheck-timer: Fix typo in comment
...
Diffstat (limited to 'drivers/hv/ring_buffer.c')
-rw-r--r-- | drivers/hv/ring_buffer.c | 22 |
1 files changed, 8 insertions, 14 deletions
diff --git a/drivers/hv/ring_buffer.c b/drivers/hv/ring_buffer.c index c3f1a9e33cef..1f450c39a9b0 100644 --- a/drivers/hv/ring_buffer.c +++ b/drivers/hv/ring_buffer.c @@ -75,8 +75,6 @@ static void hv_signal_on_write(u32 old_write, struct vmbus_channel *channel) */ if (old_write == READ_ONCE(rbi->ring_buffer->read_index)) vmbus_setevent(channel); - - return; } /* Get the next write location for the specified ring buffer. */ @@ -210,6 +208,7 @@ void hv_ringbuffer_get_debuginfo(const struct hv_ring_buffer_info *ring_info, ring_info->ring_buffer->interrupt_mask; } } +EXPORT_SYMBOL_GPL(hv_ringbuffer_get_debuginfo); /* Initialize the ring buffer. */ int hv_ringbuffer_init(struct hv_ring_buffer_info *ring_info, @@ -269,14 +268,13 @@ void hv_ringbuffer_cleanup(struct hv_ring_buffer_info *ring_info) int hv_ringbuffer_write(struct vmbus_channel *channel, const struct kvec *kv_list, u32 kv_count) { - int i = 0; + int i; u32 bytes_avail_towrite; - u32 totalbytes_towrite = 0; - + u32 totalbytes_towrite = sizeof(u64); u32 next_write_location; u32 old_write; - u64 prev_indices = 0; - unsigned long flags = 0; + u64 prev_indices; + unsigned long flags; struct hv_ring_buffer_info *outring_info = &channel->outbound; if (channel->rescind) @@ -285,8 +283,6 @@ int hv_ringbuffer_write(struct vmbus_channel *channel, for (i = 0; i < kv_count; i++) totalbytes_towrite += kv_list[i].iov_len; - totalbytes_towrite += sizeof(u64); - spin_lock_irqsave(&outring_info->ring_lock, flags); bytes_avail_towrite = hv_get_bytes_to_write(outring_info); @@ -349,18 +345,16 @@ int hv_ringbuffer_read(struct vmbus_channel *channel, u64 *requestid, bool raw) { u32 bytes_avail_toread; - u32 next_read_location = 0; + u32 next_read_location; u64 prev_indices = 0; struct vmpacket_descriptor desc; u32 offset; u32 packetlen; - int ret = 0; struct hv_ring_buffer_info *inring_info = &channel->inbound; if (buflen <= 0) return -EINVAL; - *buffer_actual_len = 0; *requestid = 0; @@ -371,7 +365,7 @@ int hv_ringbuffer_read(struct vmbus_channel *channel, * No error is set when there is even no header, drivers are * supposed to analyze buffer_actual_len. */ - return ret; + return 0; } init_cached_read_index(inring_info); @@ -417,7 +411,7 @@ int hv_ringbuffer_read(struct vmbus_channel *channel, hv_signal_on_read(channel); - return ret; + return 0; } /* |