uio_hv_generic: Remove use of PAGE_SIZE
Remove use of PAGE_SIZE for device ring buffer size calculation, as there is no dependency on device ring buffer size for linux kernel's PAGE_SIZE. Use the absolute value of 2 MB instead. Signed-off-by: Saurabh Sengar <ssengar@linux.microsoft.com> Reviewed-by: Long Li <longli@microsoft.com> Link: https://lore.kernel.org/r/1711788723-8593-8-git-send-email-ssengar@linux.microsoft.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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@ -36,7 +36,6 @@
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#define DRIVER_AUTHOR "Stephen Hemminger <sthemmin at microsoft.com>"
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#define DRIVER_DESC "Generic UIO driver for VMBus devices"
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#define HV_RING_SIZE 512 /* pages */
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#define SEND_BUFFER_SIZE (16 * 1024 * 1024)
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#define RECV_BUFFER_SIZE (31 * 1024 * 1024)
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@ -146,7 +145,7 @@ static const struct bin_attribute ring_buffer_bin_attr = {
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.name = "ring",
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.mode = 0600,
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},
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.size = 2 * HV_RING_SIZE * PAGE_SIZE,
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.size = 2 * SZ_2M,
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.mmap = hv_uio_ring_mmap,
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};
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@ -156,7 +155,7 @@ hv_uio_new_channel(struct vmbus_channel *new_sc)
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{
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struct hv_device *hv_dev = new_sc->primary_channel->device_obj;
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struct device *device = &hv_dev->device;
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const size_t ring_bytes = HV_RING_SIZE * PAGE_SIZE;
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const size_t ring_bytes = SZ_2M;
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int ret;
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/* Create host communication ring */
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@ -244,7 +243,7 @@ hv_uio_probe(struct hv_device *dev,
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size_t ring_size = hv_dev_ring_size(channel);
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if (!ring_size)
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ring_size = HV_RING_SIZE * PAGE_SIZE;
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ring_size = SZ_2M;
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pdata = devm_kzalloc(&dev->device, sizeof(*pdata), GFP_KERNEL);
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if (!pdata)
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