helper function declarations will generate unused definition warnings. array 0 array size As you should know, the valid subscripts for an array are 0 to size-1 inclusive. > array i array size-i When i0, you have. Do not put everything inside an anonymous namespace. Why is that Its not an address, its garbage data caused by your out-of-bound memory access in reverse. Indirection requires pointer when multiplying with flex in C Posted at 5 months ago Ive been trying to solve this from the past 3 hours and after solving other problems, I get another problems. Use of this source code is governed by a BSD-style license that can be Always remember that a unary operator only requires one. There are the following two pointer operators: & The & is a unary operator, returns the memory address of its operand. The base type of the pointer defines the type of object to which the pointer will point. What if you replace NET_SKB_PAD with, let's say, 8? And the name of the pointer variable is specified by name.
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> end of the cycle, I'd be more comfortable if we reverted this patch.Ĭan it be that the HW can't do DMA on an address which is not word aligned? > Unless you can fix it very quickly, and given that we're towards the > a similar logic as its buf1 counterpart.) Probably stmmac_rx_buf2_len() also need adjusting (it has char a char b char c a ’g’ b &a c &b Here b points to a char that stores ‘g’ and c points to the pointer b. The syntax simply requires the unary operator () for each level of indirection while declaring the pointer. > stmmac_rx_buf1_len() only could be (only compile tested, I don't have In C++, we can create a pointer to a pointer that in turn may point to data or other pointer. > A possible fix, which takes in account also the XDP headroom for This is an empty XDP program, its source:Įvery packet will pass untouched, but the offset will be shifted fromĠ to 256 bytes, which could trigger the problem anyway: > Sorry, you'll have to hold my hand here, as I know exactly nothing > attaching an XDP program and see if it works without my change? Also, when XDP is enabled, the offset was > Better to use stmmac_rx_offset() so to have the correct length when > before a more polished version can be submitted. > Matteo, if you do not work on a fix, I suggest we revert > I wont have time in the immediate future. > more complete patch if/when you have one. > Feels like a major deficiency of the original patch. > static unsigned int stmmac_rx_buf2_len(struct stmmac_priv *priv, > + return min_t(unsigned int, priv->dma_buf_sz - NET_SKB_PAD > - return min_t(unsigned int, priv->dma_buf_sz, plen) > /* First descriptor and last descriptor and not split > plen = stmmac_get_rx_frame_len(priv, p, coe) > + return priv->dma_buf_sz - NET_SKB_PAD. testings.cpp:114:12: note: in instantiation of function template specialization.
Listtestings.cpp:69:48: error: indirection requires pointer operand. > not split header */ if (status & rx_not_ls) Forgetful (37) I get this error when I try compiling my code is there a way I can fix this. > stmmac_priv *priv, /* First descriptor, not last descriptor and > +4508,12 static unsigned int stmmac_rx_buf1_len(struct > b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c -4508,12 > 100644 - a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c +++ > b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c index > diff -git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c > Presumably DEFAULT_BUFSIZE also want to be increased by NET_SKB_PAD for example, be used where a prvalue expression of type int is required. > stmmac_rx_buf1_len() and stmmac_rx_buf2_len() ? pointer-to-member expression in which the first operand is an xvalue and the. > Are you sure you do not need to adjust stmmac_set_bfsize(),
Linux-Kernel Archive: Re: stmmac: align RX buffers Re: stmmac: align RX buffers From: Matteo Croce
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