net: stmmac: remove axi_blen array

Remove the axi_blen array from struct stmmac_axi as we set this array,
and then immediately convert it ot the register value, never looking at
the array again. Thus, the array can be function local rather than part
of a run-time allocated long-lived struct.

Signed-off-by: Russell King (Oracle) <[e-mail]>
Link: https://patch.msgid.link/[e-mail]
Signed-off-by: Jakub Kicinski <[e-mail]>

drivers/net/ethernet/stmicro/stmmac/dwmac-dwc-qos-eth.c

···
 {
 	struct device *dev = &pdev->dev;
 	u32 burst_map = 0;
-	u32 bit_index = 0;
-	u32 a_index = 0;
 
 	if (!plat_dat->axi) {
 		plat_dat->axi = devm_kzalloc(&pdev->dev,
···
 	}
 	device_property_read_u32(dev, "snps,burst-map", &burst_map);
 
-	/* converts burst-map bitmask to burst array */
-	for (bit_index = 0; bit_index < 7; bit_index++)
-		if (burst_map & (1 << bit_index))
-			plat_dat->axi->axi_blen[a_index++] = 4 << bit_index;
-
-	stmmac_axi_blen_to_mask(&plat_dat->axi->axi_blen_regval,
-				plat_dat->axi->axi_blen, a_index);
+	plat_dat->axi->axi_blen_regval = FIELD_PREP(DMA_AXI_BLEN_MASK,
+						    burst_map);
 
 	/* dwc-qos needs GMAC4, AAL, TSO and PMT */
 	plat_dat->core_type = DWMAC_CORE_GMAC4;

drivers/net/ethernet/stmicro/stmmac/dwmac-intel.c

···
 	plat->axi->axi_rd_osr_lmt = 1;
 	plat->axi->axi_blen_regval = DMA_AXI_BLEN4 | DMA_AXI_BLEN8 |
 				     DMA_AXI_BLEN16;
-	plat->axi->axi_blen[0] = 4;
-	plat->axi->axi_blen[1] = 8;
-	plat->axi->axi_blen[2] = 16;
 
 	plat->ptp_max_adj = plat->clk_ptp_rate;
 

drivers/net/ethernet/stmicro/stmmac/stmmac_pci.c

···
 	plat->axi->axi_fb = false;
 	plat->axi->axi_blen_regval = DMA_AXI_BLEN4 | DMA_AXI_BLEN8 |
 				     DMA_AXI_BLEN16 | DMA_AXI_BLEN32;
-	plat->axi->axi_blen[0] = 4;
-	plat->axi->axi_blen[1] = 8;
-	plat->axi->axi_blen[2] = 16;
-	plat->axi->axi_blen[3] = 32;
 
 	return 0;
 }

drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c

···
 {
 	struct device_node *np;
 	struct stmmac_axi *axi;
+	u32 axi_blen[AXI_BLEN];
 
 	np = of_parse_phandle(pdev->dev.of_node, "snps,axi-config", 0);
 	if (!np)
···
 		axi->axi_wr_osr_lmt = 1;
 	if (of_property_read_u32(np, "snps,rd_osr_lmt", &axi->axi_rd_osr_lmt))
 		axi->axi_rd_osr_lmt = 1;
-	of_property_read_u32_array(np, "snps,blen", axi->axi_blen, AXI_BLEN);
-	stmmac_axi_blen_to_mask(&axi->axi_blen_regval, axi->axi_blen, AXI_BLEN);
+	of_property_read_u32_array(np, "snps,blen", axi_blen, AXI_BLEN);
+	stmmac_axi_blen_to_mask(&axi->axi_blen_regval, axi_blen, AXI_BLEN);
 	of_node_put(np);
 
 	return axi;

include/linux/stmmac.h

···
 	u32 axi_rd_osr_lmt;
 	bool axi_kbbe;
 	u32 axi_blen_regval;
-	u32 axi_blen[AXI_BLEN];
 	bool axi_fb;
 	bool axi_mb;
 	bool axi_rb;