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This issue can be fixed by increasing the DMA description define in the lpc_eth.c driver for the TX count. (Currently 16). An issue did appear with network support on the Phytec board where NFS would sometimes timeout and not recover. This didn't happen with the EA board. We are looking into this. -- KevinWells - 24 Aug 2011 http://git.lpclinux.com/?p=linux-2.6.39.2-lpc.git;a=summary -- KevinWells - 24 Aug 2011 In fact, I'm experiencing this problem on a custom board, based on the ea3250 design. I didn't change the kernel, I'm using 2.6.34. The difference between a working kernel and a non working one is the compiler. Ethernet is freezing after a few minutes when I'm compilling with gcc 4.6.1 but not with gcc 4.1.2. What seems weird is that we get a lot of RX frame errors but the fact is that there are no packets going out anymore. I didn't find a way to recover from that status yet. -- AlexandreBelloni - 25 Aug 2011
Current status of this topic: Released.
See attached patch files at the bottom by clicking 'Attachments' button.
LPC32XX? Linux-2.6.39.2 kernel patch
The LPC32XX? linux-2.6.39.2 patch available. The following are the know issues: On PHYTEC3250 board: a. USB device tests - The test cases 10, 14, 15, 16 in USB device tests using Gadget Zero driver are not working On EA3250 board: a. USB device tests - The USB device tests using Gadget Zero driver are not executed On FDI3250 board: a. USB device tests - The test cases 9, 10, 13, 14, 15, 16 in USB device tests using Gadget Zero driver are not working b. Ethernet driver - While copying data from USB mass storage device to NFS root file system, the TX buffers underflow is happening (lpc-net lpc-net.0: BUG! TX request when no free TX buffers! mesage from Ethernet driver) c. SD/MMC driver - SD/MMC data transfer not tested -- BangaragiriGovindaraju - 10 Aug 2011 This is now available on our GIT server. Please use the latest GIT version instead of the attached patch. -- KevinWells - 24 Aug 2011 >lpc-net lpc-net.0: BUG! TX request when no free TX buffers!This issue can be fixed by increasing the DMA description define in the lpc_eth.c driver for the TX count. (Currently 16). An issue did appear with network support on the Phytec board where NFS would sometimes timeout and not recover. This didn't happen with the EA board. We are looking into this. -- KevinWells - 24 Aug 2011 http://git.lpclinux.com/?p=linux-2.6.39.2-lpc.git;a=summary -- KevinWells - 24 Aug 2011 In fact, I'm experiencing this problem on a custom board, based on the ea3250 design. I didn't change the kernel, I'm using 2.6.34. The difference between a working kernel and a non working one is the compiler. Ethernet is freezing after a few minutes when I'm compilling with gcc 4.6.1 but not with gcc 4.1.2. What seems weird is that we get a lot of RX frame errors but the fact is that there are no packets going out anymore. I didn't find a way to recover from that status yet. -- AlexandreBelloni - 25 Aug 2011
PatchTopicForm edit
| Title | LPC32XX? Linux-2.6.39.2 kernel patch |
| Status | Released |
| Forum | LPC32xxLinuxPatch |
| I | Attachment | Action | Size | Date | Who | Comment |
|---|---|---|---|---|---|---|
 patch |
linux-2.6.39.2_lpc32xx_V00.patch | manage | 608.1 K | 10 Aug 2011 - 05:30 | BangaragiriGovindaraju | LPC32XX? linux-2.6.39.2 patch |
Topic revision: r3 - 25 Aug 2011 - 16:13:50 - AlexandreBelloni
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