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Char/Misc driver fixes for 4.20-rc8

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Here are 3 tiny last-minute driver fixes for 4.20-rc8 that resolve some
 reported issues, and one MAINTAINERS file update.
 
 All of them are related to the hyper-v subsystem, it seems people are
 actually testing and using it now, which is nice to see :)
 
 The fixes are:
   - uio_hv_generic: fix for opening multiple times
   - Remove PCI dependancy on hyperv drivers
   - return proper error code for an unopened channel.
 
 And Sasha has signed up to help out with the hyperv maintainership.
 
 All of these have been in linux-next for a while with no reported
 issues.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'char-misc-4.20-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc

Pull char/misc driver fixes from Greg KH:
 "Here are three tiny last-minute driver fixes for 4.20-rc8 that resolve
  some reported issues, and one MAINTAINERS file update.

  All of them are related to the hyper-v subsystem, it seems people are
  actually testing and using it now, which is nice to see :)

  The fixes are:
   - uio_hv_generic: fix for opening multiple times
   - Remove PCI dependancy on hyperv drivers
   - return proper error code for an unopened channel.

  And Sasha has signed up to help out with the hyperv maintainership.

  All of these have been in linux-next for a while with no reported
  issues"

* tag 'char-misc-4.20-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc:
  Drivers: hv: vmbus: Return -EINVAL for the sys files for unopened channels
  x86, hyperv: remove PCI dependency
  MAINTAINERS: Patch monkey for the Hyper-V code
  uio_hv_generic: set callbacks on open
This commit is contained in:
Linus Torvalds 2018-12-20 07:30:37 -08:00
commit 122b7e3380
4 changed files with 27 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
MAINTAINERS
View File

@ -6906,8 +6906,10 @@ Hyper-V CORE AND DRIVERS
M: "K. Y. Srinivasan" <kys@microsoft.com>
M: Haiyang Zhang <haiyangz@microsoft.com>
M: Stephen Hemminger <sthemmin@microsoft.com>
M: Sasha Levin <sashal@kernel.org>
T: git git://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux.git
L: devel@linuxdriverproject.org
S: Maintained
S: Supported
F: Documentation/networking/netvsc.txt
F: arch/x86/include/asm/mshyperv.h
F: arch/x86/include/asm/trace/hyperv.h

2
drivers/hv/Kconfig
View File

@ -4,7 +4,7 @@ menu "Microsoft Hyper-V guest support"
config HYPERV
tristate "Microsoft Hyper-V client drivers"
depends on X86 && ACPI && PCI && X86_LOCAL_APIC && HYPERVISOR_GUEST
depends on X86 && ACPI && X86_LOCAL_APIC && HYPERVISOR_GUEST
select PARAVIRT
help
Select this option to run Linux as a Hyper-V client operating

20
drivers/hv/vmbus_drv.c
View File

@ -316,6 +316,8 @@ static ssize_t out_intr_mask_show(struct device *dev,
if (!hv_dev->channel)
return -ENODEV;
if (hv_dev->channel->state != CHANNEL_OPENED_STATE)
return -EINVAL;
hv_ringbuffer_get_debuginfo(&hv_dev->channel->outbound, &outbound);
return sprintf(buf, "%d\n", outbound.current_interrupt_mask);
}
@ -329,6 +331,8 @@ static ssize_t out_read_index_show(struct device *dev,
if (!hv_dev->channel)
return -ENODEV;
if (hv_dev->channel->state != CHANNEL_OPENED_STATE)
return -EINVAL;
hv_ringbuffer_get_debuginfo(&hv_dev->channel->outbound, &outbound);
return sprintf(buf, "%d\n", outbound.current_read_index);
}
@ -343,6 +347,8 @@ static ssize_t out_write_index_show(struct device *dev,
if (!hv_dev->channel)
return -ENODEV;
if (hv_dev->channel->state != CHANNEL_OPENED_STATE)
return -EINVAL;
hv_ringbuffer_get_debuginfo(&hv_dev->channel->outbound, &outbound);
return sprintf(buf, "%d\n", outbound.current_write_index);
}
@ -357,6 +363,8 @@ static ssize_t out_read_bytes_avail_show(struct device *dev,
if (!hv_dev->channel)
return -ENODEV;
if (hv_dev->channel->state != CHANNEL_OPENED_STATE)
return -EINVAL;
hv_ringbuffer_get_debuginfo(&hv_dev->channel->outbound, &outbound);
return sprintf(buf, "%d\n", outbound.bytes_avail_toread);
}
@ -371,6 +379,8 @@ static ssize_t out_write_bytes_avail_show(struct device *dev,
if (!hv_dev->channel)
return -ENODEV;
if (hv_dev->channel->state != CHANNEL_OPENED_STATE)
return -EINVAL;
hv_ringbuffer_get_debuginfo(&hv_dev->channel->outbound, &outbound);
return sprintf(buf, "%d\n", outbound.bytes_avail_towrite);
}
@ -384,6 +394,8 @@ static ssize_t in_intr_mask_show(struct device *dev,
if (!hv_dev->channel)
return -ENODEV;
if (hv_dev->channel->state != CHANNEL_OPENED_STATE)
return -EINVAL;
hv_ringbuffer_get_debuginfo(&hv_dev->channel->inbound, &inbound);
return sprintf(buf, "%d\n", inbound.current_interrupt_mask);
}
@ -397,6 +409,8 @@ static ssize_t in_read_index_show(struct device *dev,
if (!hv_dev->channel)
return -ENODEV;
if (hv_dev->channel->state != CHANNEL_OPENED_STATE)
return -EINVAL;
hv_ringbuffer_get_debuginfo(&hv_dev->channel->inbound, &inbound);
return sprintf(buf, "%d\n", inbound.current_read_index);
}
@ -410,6 +424,8 @@ static ssize_t in_write_index_show(struct device *dev,
if (!hv_dev->channel)
return -ENODEV;
if (hv_dev->channel->state != CHANNEL_OPENED_STATE)
return -EINVAL;
hv_ringbuffer_get_debuginfo(&hv_dev->channel->inbound, &inbound);
return sprintf(buf, "%d\n", inbound.current_write_index);
}
@ -424,6 +440,8 @@ static ssize_t in_read_bytes_avail_show(struct device *dev,
if (!hv_dev->channel)
return -ENODEV;
if (hv_dev->channel->state != CHANNEL_OPENED_STATE)
return -EINVAL;
hv_ringbuffer_get_debuginfo(&hv_dev->channel->inbound, &inbound);
return sprintf(buf, "%d\n", inbound.bytes_avail_toread);
}
@ -438,6 +456,8 @@ static ssize_t in_write_bytes_avail_show(struct device *dev,
if (!hv_dev->channel)
return -ENODEV;
if (hv_dev->channel->state != CHANNEL_OPENED_STATE)
return -EINVAL;
hv_ringbuffer_get_debuginfo(&hv_dev->channel->inbound, &inbound);
return sprintf(buf, "%d\n", inbound.bytes_avail_towrite);
}

7
drivers/uio/uio_hv_generic.c
View File

@ -204,9 +204,11 @@ hv_uio_open(struct uio_info *info, struct inode *inode)
if (atomic_inc_return(&pdata->refcnt) != 1)
return 0;
vmbus_set_chn_rescind_callback(dev->channel, hv_uio_rescind);
vmbus_set_sc_create_callback(dev->channel, hv_uio_new_channel);
ret = vmbus_connect_ring(dev->channel,
hv_uio_channel_cb, dev->channel);
if (ret == 0)
dev->channel->inbound.ring_buffer->interrupt_mask = 1;
else
@ -334,9 +336,6 @@ hv_uio_probe(struct hv_device *dev,
goto fail_close;
}
vmbus_set_chn_rescind_callback(channel, hv_uio_rescind);
vmbus_set_sc_create_callback(channel, hv_uio_new_channel);
ret = sysfs_create_bin_file(&channel->kobj, &ring_buffer_bin_attr);
if (ret)
dev_notice(&dev->device,