[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [PATCH v3] fix endianness bug
From: |
Richard Henderson |
Subject: |
Re: [PATCH v3] fix endianness bug |
Date: |
Thu, 25 Apr 2024 08:24:53 -0700 |
User-agent: |
Mozilla Thunderbird |
On 4/25/24 06:41, Alexandra Diupina wrote:
+static MemTxResult xlnx_dpdma_read_descriptor(XlnxDPDMAState *s,
+ uint64_t desc_addr, DPDMADescriptor *desc)
+{
+ if (dma_memory_read(&address_space_memory, desc_addr, &desc,
+ sizeof(DPDMADescriptor), MEMTXATTRS_UNSPECIFIED))
+ return MEMTX_ERROR;
+
Missing { } for docs/devel/style.rst.
+static void xlnx_dpdma_write_descriptor(uint64_t desc_addr,
+ DPDMADescriptor *desc)
+{
+ /* Convert from host endianness into LE. */
+ desc->control = cpu_to_le32(desc->control);
+ desc->descriptor_id = cpu_to_le32(desc->descriptor_id);
+ desc->xfer_size = cpu_to_le32(desc->xfer_size);
+ desc->line_size_stride = cpu_to_le32(desc->line_size_stride);
+ desc->timestamp_lsb = cpu_to_le32(desc->timestamp_lsb);
+ desc->timestamp_msb = cpu_to_le32(desc->timestamp_msb);
+ desc->address_extension = cpu_to_le32(desc->address_extension);
+ desc->next_descriptor = cpu_to_le32(desc->next_descriptor);
+ desc->source_address = cpu_to_le32(desc->source_address);
+ desc->address_extension_23 = cpu_to_le32(desc->address_extension_23);
+ desc->address_extension_45 = cpu_to_le32(desc->address_extension_45);
+ desc->source_address2 = cpu_to_le32(desc->source_address2);
+ desc->source_address3 = cpu_to_le32(desc->source_address3);
+ desc->source_address4 = cpu_to_le32(desc->source_address4);
+ desc->source_address5 = cpu_to_le32(desc->source_address5);
+ desc->crc = cpu_to_le32(desc->crc);
This is incorrect, rewriting in place, because after the call,
if (xlnx_dpdma_desc_completion_interrupt(&desc)) {
the memory block is still live, and the swap here has corrupted it.
+
+ dma_memory_write(&address_space_memory, desc_addr, &desc,
This is incorrect because desc is now a pointer so &desc is DPDMADescriptor **.
Do not reply to an existing thread to post a new patch.
r~
- RE: [PATCH RFC] prevent overflow in xlnx_dpdma_desc_get_source_address(), (continued)
- RE: [PATCH RFC] prevent overflow in xlnx_dpdma_desc_get_source_address(), Konrad, Frederic, 2024/04/17
- Re: [PATCH RFC] prevent overflow in xlnx_dpdma_desc_get_source_address(), Alexandra Diupina, 2024/04/23
- Re: [PATCH RFC] prevent overflow in xlnx_dpdma_desc_get_source_address(), Peter Maydell, 2024/04/23
- [PATCH v2 RFC] fix host-endianness bug and prevent overflow, Alexandra Diupina, 2024/04/24
- Re: [PATCH v2 RFC] fix host-endianness bug and prevent overflow, Peter Maydell, 2024/04/24
- [PATCH] fix host-endianness bug, Alexandra Diupina, 2024/04/24
- Re: [PATCH] fix host-endianness bug, Peter Maydell, 2024/04/25
- [PATCH v2] fix host-endianness bug, Alexandra Diupina, 2024/04/25
- Re: [PATCH v2] fix host-endianness bug, Philippe Mathieu-Daudé, 2024/04/25
- [PATCH v3] fix endianness bug, Alexandra Diupina, 2024/04/25
- Re: [PATCH v3] fix endianness bug,
Richard Henderson <=
- [PATCH] fix bit fields extraction and prevent overflow, Alexandra Diupina, 2024/04/24
- Re: [PATCH] fix bit fields extraction and prevent overflow, Peter Maydell, 2024/04/25